Baked scallops au gratin: the festive starter, tender and golden
Gratinated scallops are the starter that always makes an impression on the Christmas table. A fondue of leeks, a creamy white wine sauce, scallops just pearly and a golden crust. The pitfall? Overcooked scallops that turn rubbery. With a very hot grill and four minutes of cooking, they stay tender.
- 4 servings as a starter, 30 min preparation
- Scallop meat just seared for 30 seconds per side
- Grill maximum power, 3 to 4 min, no more
- Shells assembled in the morning, gratinated at the last moment
Appliance and settingInduction hob, then oven grill
Ingredients
A smart starter, to make ahead
For Christmas, we love a starter that looks like it takes hours but can be prepared in the morning. Scallops au gratin tick every box. The golden rule: the scallop meats barely cook before the oven. It's the grill, very hot and very brief, that finishes them by browning the breadcrumbs.
The steps
- Prepare the scallop meats. Rinse them quickly under cold water, remove the small tough muscle on the side, then dry them thoroughly on kitchen paper. Keep them chilled.
- The leek fondue. Finely slice the leeks and shallot. Melt 20 g of butter in a sauté pan on the hob at level 5 (out of 9). Add the vegetables, season, cover and let them melt for 12 minutes at level 4, stirring from time to time. They should be tender, not coloured.
- The sauce. Pour the white wine over the leeks and let it reduce for 2 minutes at level 6. Add the cream, pepper and simmer for 4 minutes. Off the heat, take four spoonfuls of sauce, mix them with the egg yolk, then pour back into the pan, stirring.
- Sear the scallop meats. Heat the remaining butter in a frying pan at level 8. When it foams, sear the scallop meats 30 seconds per side, just to colour them. Remove them straight away.
- Assemble the shells. Spread the leek fondue over the base of the shells, place three scallop meats in each, coat with sauce. Mix the breadcrumbs and cheese and sprinkle over the top.
- Brown the top. Preheat the grill on maximum power for 5 minutes. Set the shells on a tray (on a bed of coarse salt, they won't tip over) and place on level 3 or 4, close to the top, for 3 to 4 minutes. Take them out as soon as the crust is golden and the sauce is bubbling.
Appliance settings
| Step | Appliance and mode | Setting | Duration |
|---|---|---|---|
| Leek fondue | Induction hob | Level 5, then 4 covered | 12 min |
| Sauce | Induction hob | Level 6, then simmer at level 4 | 6 min |
| Sear the scallop meats | Induction hob, frying pan | Level 8 | 30 s per side |
| Gratinate (recommended method) | Full grill | Maximum power, shelf level 3 or 4 | 3 to 4 min |
| Gratinate (variation) | Fan grill | 230 °C, shelf level 3 | 4 to 5 min |
| Shells taken from the fridge | Fan oven, then grill | 180 °C 5 min, then grill 3 min | 8 min |
If the assembled shells come straight from the fridge, the sauce is cold: warm them through for 5 minutes in fan oven first before switching to the grill, otherwise the crust will burn before the centre is hot.
Variations
- Belgian style, with mash : pipe a ring of mash around the edge of the shell with a piping bag before gratinating. It browns and makes the starter even more generous.
- With brown shrimps : add a spoonful of brown shrimp to each shell, along with the scallop meats.
- With champagne : replace the white wine with a splash of champagne or brut crémant.
- With chicons (Belgian endive) : replace the leeks with two thinly sliced chicory, melted in butter with a pinch of sugar.
Storage and advance preparation
The leek fondue and the sauce can be made the day before and kept in the fridge in a sealed container. The assembled shells can wait for up to 6 hours in a cool place, covered with cling film. Once browned, they should be eaten straight away: reheated scallops toughen, so avoid that.
Ask your fishmonger for empty shells: they often have spares and are happy to give them away. Wash them well, they'll last for years. And for a stress-free service on Christmas Eve, assemble everything in the morning: while guests have drinks with prawn croquettes, all that's left to do is switch on the grill.
Which appliance?
To brown everything in a few minutes without drying it out, you need a powerful, even grilland a precise hob for the sauce.
A multifunction oven with a good grill
A full-width grill or fan grill browns all the shells at once. Examples from our range: Bosch HBA572BW3F (pyrolytic, Air Fry tray included), Siemens HB774G2B1 (iQ700, core temperature probe, up to 300 °C), Smeg SFP6401TB (pyrolytic, strong fan grill), Hisense BI64211EPX (pyrolytic, budget price).
From 449,99 € to 1 229,99 €
A precise induction hob
For searing the scallop meat over high heat and then simmering a cream sauce, a responsive induction hob helps a lot. Example: Siemens EH631BJB6E, three zones with booster and 17 heat settings.
609,99 €
An induction cooker
The Beko FBE68314MXC combines a three-zone induction hob and a 72-litre multifunction oven.
699,99 €
Public prices noted on 15 October 2026: the product page is definitive, and Nimesclub members often get a reduced price.
Ovens and hobs for gratins in store
BOSCH HBA572BW3F Built-in Oven€829.00
SIEMENS HB774G2B1 Built-in Oven€1,229.00
Built-in oven HISENSE BI64211EPX€449.00
Built-in oven SMEG SFP6401TB€699.00
Induction Hob SIEMENS EH631BJB6E€609.00
Cooker BEKO FBE68314MXC€699.00Large grill or fan grill? The difference is explained in our guide to oven functions. And for the whole festive meal, follow our oven-baked Christmas menu.
Frequently asked questions
Can I use frozen scallops?
Yes, no problem. Thaw them overnight in the fridge on kitchen paper, never in warm water. Dry them well before searing, otherwise they'll stew instead of browning.
How do you know when the scallops are cooked?
Properly cooked scallop meat is pearly right through, still slightly translucent in the centre. It should stay soft when pressed. If it turns white and firm all over, it's overcooked: that's why you only sear it briefly before the grill.
Can the shells be prepared the day before?
Make the leek fondue and the sauce the day before. On the day, sear the scallop meat, assemble the shells in the morning and keep them cool. Only 5 minutes under the grill are needed before serving.
The right oven makes all the difference
Steam ovens, pyrolytic ovens, induction hobs: come and see them at our Temploux store, or ask our expert salesperson for advice.
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