Ingredients for 6 serves:
1.5kg selection fish (conger or coastal if possible) 
2 onions
1 carrot
3 bay leaves
3 sprigs thyme
4 heads of garlic
50g slightly salted butter
Table salt and pepper
Water
For the sauce:
1 tablespoon Dijon mustard
3 tablespoons white wine vinegar
9 tablespoons sunflower oil
½ bunch of parsley
3 eggs
1 head of garlic
3 grey shallots
Preparation
Preparation 30mn; cooking 30mn
1- Clean out and wash the fish. Cut them into sections or slices, except for the small ones (which you can keep intact). Peel the vegetables, mince the onions, and slice the carrots and the potatoes.
2- Melt the onions over medium heat in a stewpot until they become transparent. Add the garlic, the carrots and the potatoes. Cover the ingredients with water, then add salt and pepper. Bring to the boil, then reduce heat and simmer for 10 minutes.
3- Meanwhile, prepare your gribiche sauce. Put the eggs in a medium saucepan with water, salt and one tablespoon of vinegar. Cook for 12 minutes if you start with cold water. Otherwise, cook for 10 minutes if you start with boiling water then cool it down using water.
Peel and finely chisel the garlic and the shallots. Mix the mustard, the vinegar, the garlic, the shallots, salt and pepper in a bowl. Pour a small dribble of oil while whipping with a medium whisk so as to emulsify the mixture.
Peel and cut the eggs up. Add them in your vinaigrette dressing with the parsley. Then decant it all into a sauceboat.
4- First, place the fish with firm flesh into the stewpot and cook for 10 minutes. Then add the other fishes with tender flesh and cook for 5 to 6 minutes. End by adding the more delicate and small ones, cook over low heat for 4 minutes.
5- Remove carefully the fishes with a skimmer and place them in a hot service dish. Arrange the vegetables all around. Cover with 2 ladles of stock and pour a few tablespoons of gribiche sauce.
Serve separately the stock in a tureen, the fish in a dish and the sauce in a sauceboat.
Accompany with toasted rye bread from the day before.
If ever one of your guests laughs like a seagull, then tell your friends a funny joke and you will feel like you are in coastal Brittany.
HAAARIH-HAAARIH...