Place the shrimps in a sieve and defrost at room temperature. Peel shallots and garlic. Cut shallots into fine cubes and garlic into thin slices. Wash thyme, shake dry and pluck leaves from the stalks. Melt butter in a pot, sauté shallots and garlic in it. Deglaze with white wine and fish stock, add thyme, bay leaf and cloves and simmer for about 10 minutes
Wash and clean the celery, setting aside some greenery, cut the celery into cubes. Peel and wash the carrots and also cut them into cubes. Clean, clean and halve the mushrooms
Wash the fish, dab dry and cut into even cubes. Peel prawns, remove intestines, wash prawns and pat dry. Heat 1 tbsp. oil in a pan. Sauté the mushrooms for 4-5 minutes while turning, season with salt and pepper and remove. Heat 1 tablespoon of oil in a frying pan. Fry the prawns for 3-4 minutes while turning, season with salt and pepper
Bring the sauce to the boil, add the celery and carrots. Stir in crème fraiche, season with salt and pepper. Switch off the stove. Mix the egg yolks and stir into the sauce after about 2 minutes
Add fish, shrimps and mushrooms to the sauce. Let the fish simmer for about 5 minutes. Serve the finished blanquette in deep plates. Garnish with celery green. Roasted baguette tastes good with it