Grey Shrimp Croquettes with Rich Bouillon Soup

Prepare the Croquette Filling

1. Melt 2oz butter in a saucepan over medium heat. Whisk in 2oz flour and cook for 1-2 minutes, stirring constantly, to make a roux.
2. Gradually whisk in the warm milk until the sauce is smooth and thick. Continue to cook, stirring, for about 5-7 minutes.
3. Remove from heat. Stir in the egg yolks, nutmeg, salt, and pepper. Mix well.
4. Gently fold in the peeled grey shrimp. Pour the mixture into a shallow dish and cover with plastic wrap, pressing it directly onto the surface to prevent a skin from forming. Chill for at least 2 hours, or until firm.

Form and Coat the Croquettes

1. Once the mixture is chilled and firm, shape it into small, uniform croquettes using wet hands. You can make about 8-10 croquettes.
2. Set up three shallow dishes: one with 4oz flour, one with 2 beaten eggs, and one with 5oz breadcrumbs.
3. Dredge each croquette first in flour, then dip in egg, and finally coat thoroughly with breadcrumbs. Ensure an even coating.
4. Place the coated croquettes on a clean plate or tray and chill again for at least 30 minutes to help them hold their shape during frying.

Prepare the Bouillon Soup

1. In a pot, melt 1oz butter over medium heat. Add the sliced leek and sauté until softened, about 5 minutes.
2. Pour in the fish broth and bring to a simmer. Season with salt and white pepper to taste.
3. Simmer the soup gently for about 10-15 minutes to allow the flavors to meld. Stir in half of the chopped parsley just before serving.

Fry the Croquettes and Serve

1. Heat vegetable oil in a deep fryer or a deep, heavy-bottomed saucepan to 180°C (350°F). Make sure there's enough oil to submerge the croquettes.
2. Carefully fry the croquettes in batches, taking care not to overcrowd the pan. Fry for 3-5 minutes, or until golden brown and crispy. Use a slotted spoon to remove them and drain on paper towels.
3. To serve, ladle the hot bouillon soup into shallow bowls. Place 2-3 hot grey shrimp croquettes into each bowl of soup. Garnish with the remaining fresh chopped parsley.