How to make
Clean and wash the spinach. Put it to boil in salted water, drain and chop it finely.
Fry the flour in heated butter. Top it up with milk and 1 cup of the water, in which you boiled the spinach. Allow the sauce to boil for 5 minutes over low heat, then remove it from the heat and thicken it with 3 beaten egg yolks. Whip the whites into snow with a pinch of salt.
Add the spinach, salt and egg whites and mix gently. Pour the mixture into a buttered tray, sprinkled with breadcrumbs. Grate cheese and distribute butter cubes on top. Bake the spinach soufflé in a heated oven and serve it immediately.
Similarly, you can prepare a soufflé of nettle, dock, or sorrel.
