Cleaning mushrooms, washing them. Wash asparagus, cut off woody ends. Peel white asparagus. Cut the whole asparagus into slices. Steam white asparagus covered in little boiling salted water for about 5 minutes.
Steam the green asparagus for about 3 minutes. Drain the asparagus.
Peel and chop the onions. Wash the fillet, dab dry and cut into pieces. Fry the meat in portions in hot oil for about 5 minutes. Season with salt and pepper. Take out. Heat butter in the frying fat.
Fry the mushrooms and onions in it. Dust with flour and sauté briefly. Stir in 1 l water, wine, cream and stock, bring to the boil. Simmer for about 5 minutes.
Add peas, meat and asparagus to the sauce. Simmer for 3-5 minutes. Season to taste. Wash the chervil, stir in the leaves. Serve everything. Serve with, for example, fresh puff pastry fleurons.