Wash the turkey filet, dab dry and cut into pieces of about 3 cm. Peel and finely chop the shallots. Heat clarified butter. Fry the shallots and fillet in it, turning them golden brown.
Season with salt and pepper. Deglaze with white wine, vermouth and stock. Let it boil down at high heat for 15-20 minutes. In the meantime peel and wash the carrots and kohlrabi and cut them into fine pieces.
Wash the asparagus, cut the woody ends off briefly. Halve the asparagus. Cook vegetables in boiling salted water for 10-12 minutes, then drain. Just before serving, toss in melted fat.
Whisk the egg yolk and 50 g cream. Thicken the sauce with it. Do not let it boil anymore. Whip remaining cream until stiff and fold in. Flavour again. Serve turkey filet and vegetables garnished with chervil and citrus wheels.
Boiled potatoes taste good with it.