The recipe:

Peel and wash the vegetables.

Slice the leeks and sweat them in a casserole (Dutch oven?).

Make a white roux to cover the white part of the leeks, then add milk (1/4 liter) and water (2 liters). Add the cauliflower. Then cook one hour over low heat.

Cook in salted boiling water or steam the tops of cauliflower.

Mix the cauliflower and leeks, then pass the soup. Boil again, add the cream and egg mix, remove from the heat once its starts simmering, then keep in a bain-marie. Adjust the seasoning.

Cut Epoisses into small cubes. Arrange the diced Epoisses on plates or in the soup bowl. Add the cauliflower tops. Then pour the boiling soup over the top. Garnish with sprigs of chervil.

Serve immediately.