1. The court-bouillon:
2. Take a few green leek leaves, the tougher outer leaves of each fennel bulb, and 50g of carrots for the court-bouillon preparation.
3. Slice the carrots, cut the leek and fennel leaves into large pieces, remove the garlic germ, and put everything, along with the parsley, in a large pot with 1 liter of water and white wine.
4. Season with salt and pepper. Bring to a boil, then cover and let simmer for 30 minutes.
5. The side vegetables:
6. Dice the carrots and leeks.
7. Cut the fennel bulbs in half, then each half into 3 pieces.
8. Heat a drizzle of olive oil in a sauté pan, sweat the leeks for a few minutes, add the carrots, and after a few minutes, place the fennel pieces on top of the vegetable mixture.
9. Season with salt (herb salt for me) and pepper, cover, and let steam until the fennel is tender but not falling apart (about 30 minutes).
10. Cooking the fish:
11. When the court-bouillon is ready, remove the vegetables with a slotted spoon and add the squid rings. Let simmer until tender (about 30 minutes).
12. Then add the cod cut into large chunks, let simmer for 5 minutes, and incorporate the scallops.
13. After 5 minutes, remove the fish and keep it warm while preparing the sauce.
14. The sauce:
15. In a saucepan, melt 50g of butter and add the flour, stirring constantly over heat until the roux is well combined but without letting it brown.
16. Add the court-bouillon and bring to a boil, stirring constantly.
17. Let simmer over low heat until the sauce has a nice velvety texture.
18. In a bowl, mix the egg yolk and cream, slowly adding some of the sauce to warm the egg.
19. Pour the mixture into the saucepan, add the lemon juice (more or less according to taste), and adjust the seasoning.
20. Serve the fish and vegetable garnish on hot plates, drizzled with a little sauce.