Choux pastry, potato and seaweed
Make a choux pastry with 15cl of water and 10cl of the cooking juice of the mussels.
Bake the potatoes, split lengthwise, on a bed of coarse salt for about 1 hour at 180°C.
Put the potato flesh through a purée mill.
Mix the choux pastry with 400g of potato flesh and 10g of dried seaweed (sea lettuce, kombu, dulce…).
Cook in a waffle maker.
Cook sea buckthorn berries with sugar and agar agar until boiling, simmer over low heat for 10 minutes. Blend, strain and cool until ready to serve.
Carefully scrape the mussels and wash them 2 to 3 times. Drain and set aside in a cool place. Peel and finely chop the shallots, fennel and celery.
Chop the parsley and peel and mince the garlic.
In a large casserole, melt the butter. Add the chopped vegetables and sauté for a few minutes.
Finally, add the garlic, parsley and mussels. Sprinkle with white wine and pepper.
Cover and cook over high heat for 10 to 15 minutes, stirring from time to time with a skimmer.
Stop cooking when all the mussels have opened. Discard any mussels that remain closed.
Mayonnaise with mussel juice
Make a classic mayonnaise by replacing half of the oil with the cooled mussel juice.