Wash the asparagus. Peel white asparagus, cut off woody ends. Cut the green asparagus ends generously
cut off. Cut the asparagus into pieces. Peel and wash carrots and cut into diagonal slices. Clean and wash mushrooms
Wash the fillet and pat dry. Season with salt and pepper. Fry well all around in hot oil. Then fry for about 10 minutes, turning frequently.
Cook the white asparagus in lightly salted, slightly boiling water, covered with sugar for about 10 minutes. Add green asparagus and carrots after 5 minutes and cook along. Drain
Remove the fillet. Fry the mushrooms in the frying fat for 2-3 minutes. Season with salt and pepper. Remove and mix with the vegetables. Pour into a large greased casserole dish. Cut the fillet into slices and place on top
Whisk sour cream and eggs. Season with salt, pepper and nutmeg and pour over the vegetables. Bake everything in the preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for about 30 minutes. Grate cheese finely. Sprinkle with breadcrumbs after about 15 minutes. Spread the butter in flakes and bake everything ready