Steam the Bouchot mussels until they open.
Strain the liquid through a fine sieve and reserve.
Sauté the mirepoix of celery and onion in the Roast & Fry.
Deglaze with the white wine.
Add the thyme, garlic, pepper and salt.
Add the mussel liquid and allow to reduce further.
Add the Cream and Butter to make a light sauce.
Finish the sauce with the mussels, the peeled grey shrimps, the oysters, the salmon eggs and the cooked celeriac brunoise.
Season with lemon juice, salt and pepper.