LITTORALICIOUSA sole chef without a sous-chef has one. It is bolted to the bulkhead. The rest of this is the operating manual.
The Rational rewards the chef who reads its manual. Every programme below replaces a pan, a timer, or a body in the galley. Spend two charters running each one deliberately and the box starts doing the work.
1. Steam Mode for Rice (and Everything Else That Lives in Water)
The programme: Steam, 100°C, 100% humidity. No pot. No watching. No starch on the cooktop.
The recipe — jasmine rice, 8 portions
| Step | Action |
|---|---|
| 1 | 800g jasmine rice, rinsed three times until the water runs clear, into a 1/1 GN hotel pan, 65mm deep |
| 2 | 960g cold water (1:1.2 by weight), 8g fine salt, 30g neutral oil |
| 3 | Cover with foil, slot in middle rack, Steam mode 100°C, 18 minutes |
| 4 | Rest covered 5 min, fluff with a fork |
The water absorbs entirely, the grains separate, the cooktop stays clean for the protein. Same protocol works for basmati (16 min), brown rice (40 min, 1:1.5), couscous (off the heat, just steam-rehydrate 8 min), bulgur, freekeh, polenta. Doubles as the vegetable steamer — broccoli florets, green beans, asparagus all hold colour at 100°C steam for 4–6 min, drained ice-cold for service. Mussels, clams, shellfish: 100°C steam, 5–7 min until they open.
Why it works: saturated steam transfers heat by latent condensation, not convection. The rice cooks at exactly 100°C — no scorching, no uneven hot spots, no risk of the bottom layer catching while the top stays raw. The hotel pan stacks with whatever else is already in the oven.
Cross-link: Chicken Soup: The Perfect Version — same Steam-mode logic for the stock pull at 95°C.
2. Combi-Roast at 300°C: Maillard, Then Out
The programme: Combi, 300°C, 0–10% humidity, fan 4–5. The hottest the box goes.
The setup that eliminates cleaning. Sheet tray, sheet of aluminium foil edge-to-edge, sheet of baking parchment on top of the foil. Protein on the parchment. After service, lift the parchment-and-foil parcel out as one piece, bin it. Tray comes out clean. This is the single biggest time-saver in this manual and almost nobody does it.
Pull times at 300°C combi
No preheat needed if the box is hot from breakfast.
| Cut | Size | Time | Pull at |
|---|---|---|---|
| Chicken breast, cubed | 2.5 cm dice | 6 min | Maillard visible on top edges |
| Chicken thigh strips | 1.5 cm × 5 cm | 5–6 min | Browned, juicy |
| Pork tenderloin medallions | 2 cm | 5 min | 60°C internal, rest 4 min |
| Salmon supreme | 4 cm thick | 8 min | 48°C internal (medium) |
| Prawns, shell-on | 16/20 | 3 min | Shells coral, just opaque |
| Steak (after cold-sear) | 3 cm | 4–5 min | 52°C internal for medium-rare |
When the surface darkens from beige to true mahogany — that uneven, varnished colour, not flat brown — Maillard has set. Open the door, pull the tray. If you wait for a timer to ring, you have already overshot. The browning is the timer.
Why it works: at 300°C, the protein surface dehydrates and Maillard runs hot enough that the interior never has time to overcook. A 6-minute chicken cube is golden outside, 70°C inside, pull it now and rest it. Compare to 180°C where you wait 15 minutes and the centre dries out before the surface caramelises.
Smoke. At 300°C, anything sugary in a marinade will scorch. Pat the protein dry before going in, marinate with oil and aromatics rather than honey or soy-heavy glazes, and glaze in the last 60 seconds with the door cracked.
3. Overnight Low-Temp: The Box Cooks While You Sleep
The programme: Combi, 80–110°C depending on cut, probe in to a target core temperature, oven holds at probe-target indefinitely.
This is the single most underused mode on every Rational on every yacht. You go to bed. The oven cooks. You wake up to a finished braise that you didn't tend.
- Lamb shoulder, 5 kg bone-in. Dry-rub the night before. 110°C combi, probe to 90°C internal, finish 220°C 15 min for the bark. In the box at 22:00, pulled at 09:00. Eleven hours of work you didn't do. Full method: Roast Lamb: The Perfect Version (Overnight Shoulder).
- Beef brisket, 4 kg. 95°C combi at 50% steam, probe to 92°C, 12–14 hours. Wrap in butcher paper at hour 8 if you want a softer bark.
- Pork shoulder for crew tacos. 100°C combi at 30% steam, 10 hours, no probe — the connective tissue is the timer, fork-test in the morning.
- Bone broth, full stockpot. 90°C steam, 12 hours, no boil-over, no scum-skim, gelatin-rich and clear.
- Stewed legumes. Soaked chickpeas at 95°C steam 4 hours overnight finish into hummus or a chickpea braise the next day.
Why it works: below 100°C, water in the meat does not boil out. Connective collagen hydrolyses to gelatin between 70°C and 90°C — at low temperatures with long times, every fibre converts evenly without the muscle squeezing dry. The oven holds the probe-target ±0.5°C indefinitely. There is no "overcooked" at 90°C internal; the meat plateaus.
Verify the probe is actually in the geometric centre of the cut, not in fat or against bone. Bone reads 5–8°C higher than meat, fat reads lower. A bad probe placement means a bad pull. Push it in, look at the reading, reposition until it stabilises.
4. Croissant Programme: Frozen at 06:00, Plated at 06:25
The programme: Bakery > Pastries > Croissants. Or manual: Combi 175°C, 30% humidity, 18 min, fan 3.
Buy frozen unbaked croissants from a professional supplier — Bridor, Galaxie, or whatever the local Carrefour Pro / Metro carries. They land on the boat, they live in the freezer at −18°C, they bake from frozen.
The recipe
- Out of freezer onto baking-paper-lined tray, generous spacing (they triple in size).
- Egg-wash with a beaten yolk + 1 tbsp cream, light strokes, do not flood the laminations.
- Croissant programme. Walk away.
- 18 minutes later: deep gold, audible shatter when squeezed. Cool 4 minutes before plating.
Why it works: the programme injects steam in the first three minutes — the surface stays plastic, the layers expand, then the heat ramps and the dry phase sets the shell. Manual baking at constant 200°C in a domestic oven splits the laminations and dries the crumb. The Rational does the steam-then-dry phase change automatically.
Variations on the same programme: pain au chocolat (same setting), brioche (170°C, 25 min, 40% humidity), pain de mie loaves (180°C, 35 min, 20% humidity), focaccia from frozen dough balls (220°C combi, 12 min, 50% humidity). Owners do not know the croissants came from a freezer. They are not supposed to.
5. Roast Chicken Programme: Probe In, Forget
The programme: Meat > Poultry > Whole Chicken. Probe to 72°C breast / 82°C thigh.
The chicken goes on a rack over a tray, lemon and thyme in the cavity, salted skin, breast-up. The programme handles the rest: high heat to crisp skin, ramp down to finish gently to probe-target, hold while you plate the other components.
Why a sole chef should default to this for any service of 8 or fewer:
- Two minutes of active work (truss, season, probe, push button)
- The oven self-adjusts; you cannot overcook it
- The juices in the tray become the jus — splash with white wine and shallot, reduce on the cooktop in 4 minutes
- Carved family-style or plated, both correct
- You can run two birds side-by-side on the same probe-target if both are similar weight
The recipe (1.6 kg organic chicken, 4 portions). Butter under the skin, salt 24 hours ahead if you can (dry brine), thyme + half a lemon in the cavity, on the rack, probe through the breast into the thickest part avoiding bone, Poultry programme, 70 min approximate. Rest 12 minutes uncarved.
Cross-link: Chicken Soup: The Perfect Version — what to do with the carcass once dinner is over.
6. Finishing Mode: The Reason You Can Plate 12 Covers Alone
The programme: Finishing > à la carte / Banquet, depending on whether plates go out one-by-one or all at once.
This is the mode that separates chefs who work with the Rational from chefs who work next to it.
How it works. Pre-plate the dish 30–45 minutes before service. Slide the plates onto rack-mounted trays directly into Finishing mode. The oven holds at 75–80°C with controlled humidity — sauces stay glossy, proteins do not dry, vegetables do not wrinkle. When the guest is ready, pull, garnish, send.
Why it works: domestic ovens at "warm" (75°C dry) desiccate everything in 8 minutes. Finishing injects steam pulses that match the moisture profile of the dish — a low-humidity setting for crisp textures, a high-humidity setting for braised plates. The plate that has been holding for 30 minutes hits the table looking like it left the pass two minutes ago.
Eight covers, three courses, alone. Finishing absorbs the timing risk. Plate the mains while the starters go out, hold all eight in the box, fire only when the floor confirms.
7. iLevelControl: Three Pans, Three Timers, One Box
The screen shows you three loads at once. Salmon on rack 2 (8 min), broccoli on rack 4 (6 min), potatoes on rack 6 (already 12 minutes in, 4 to go). Each rack chimes when done. You pull what is ready, you load what comes next.
This is the closest thing to a sous-chef the box can offer: three concurrent timers managed for you, optimised for a single ambient temperature and humidity. The Rational also suggests load combinations that share programme parameters — it will tell you not to combine the pavlova with the bouillabaisse.
Sole-chef move. At lunch, run the salmon, the side vegetables, and the warm grain salad in the same box on one programme, three different pull-times. One protein station replaces three pans on the cooktop.
8. Self-Clean Overnight
The 1.5-hour medium clean cycle runs while you sleep. Stack the dirty trays on the rack, drop in two cleaner tabs, two rinse tabs, press start at 23:00. Wake up to a box that smells like nothing and trays that need a quick wipe.
Why this matters for a sole chef: without a stew, you do the deep clean. That is 45 minutes you do not have. Run the cleaning cycle as part of the closedown checklist and the box hands you a clean galley start at breakfast.
The Rational's cleaning chemicals are caustic — handle the tabs with gloves, do not touch the cycle mid-run, ventilate the galley. Marine version vents are sized for it; domestic-spec installs sometimes are not. Verify the extraction.
A Sole-Chef Day, Routed Through One Box
| Time | Programme | What |
|---|---|---|
| 06:30 | Croissants (Bakery) | Frozen → plated breakfast |
| 07:30 | Combi 200°C | Bacon, hash, sheet-pan eggs |
| 09:30 | Steam 100°C | Crew lunch rice (40 portions, two hotel pans) |
| 11:00 | iLevelControl | Salmon + greens + grain — guest lunch |
| 14:30 | Combi 110°C, probe 90°C | Lamb shoulder for tomorrow's guest dinner (in 14:30, out 04:30) |
| 18:00 | Combi 300°C 6 min | Crew dinner — chicken cubes for 18 portions |
| 20:30 | Finishing 80°C | Plate-and-hold guest mains for late seating |
| 23:00 | Auto-clean medium | Closedown |
One box, eight roles, one chef. The cooktop ran for sauces and pasta-water. Everything else routed through the wall.
The Proof
| Metric | Domestic-oven workflow | Rational-as-sous-chef |
|---|---|---|
| Active galley hours / day | 14–16 | 9–11 |
| Pots and pans washed / service | 12–18 | 4–6 |
| Cleaning time / day | 60–90 min | 15 min + auto-clean |
| Dishes held warm without quality loss | 0 | All of them |
| Overnight cooking output | None | 1 large braise / night |
| Crew meals from same protocol as guest | Re-cook | Same tray, different rack |
Where Most Go Wrong
Treating the Rational like a "smart oven" — letting the assistants run with default parameters, never logging custom programmes, never probing. The probe is the difference between a programme that works once and a programme that works every time. Probe everything that takes longer than 20 minutes. Custom-save the programmes that worked. Name them after the dish. The next chef, or the next-week version of you, will use them.
The Catch
The Rational rewards the chef who reads its manual. The sole chef who treats it as a hot box and a steamer is leaving 70% of the machine on the shelf. Spend two charters running each programme deliberately — pick one new programme per service, force yourself to use it, log what worked. By charter three, the box is doing the work and you are tasting, plating, talking to the chief stew. That is the job the iCombi was built to give you back.
It does not replace technique. It replaces the part of technique that is repetitive temperature management. Knowing when the lamb is ready, why the croissant laminates, what the chicken jus needs — that stays with you. The 110°C hold and the 18-minute timer go to the box.
The Bottom Line
A sole chef with a Rational and the discipline to use it is a two-person galley with one salary. A sole chef without that discipline is a domestic cook in a uniform. The box on the wall does not care which one you are. Pick the first one.
Source: Aggregated from yacht chef WhatsApp community polling (Rational vs. Convotherm 33–0, July 2025 – January 2026), Rational AG iCombi Pro technical documentation, independent service engineer notes, and direct daily use across multiple charter seasons. All cooking parameters tested in marine-spec iCombi Pro 6-2/1 and 10-1/1 units.
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