Fry the minced meat, season with salt and pepper. In the meantime, cook the cleaned cauliflower and cut into florets and the carrots cut into slices in the vegetable stock for about 10 minutes.
Put the minced meat in a baking dish. Spread the vegetables over it. Prepare a roux from the butter and flour. Prepare a thick sauce with the vegetable water and roux. Then stir the creme fraîche and sour cream into the sauce. Season again with pepper, salt and a little nutmeg.
Pour over the cauliflower and sprinkle with the cheese. Cook in the oven at 200 ° C for about 1 hour.