Clean the cauliflower and broccoli, wash them and cut them into small florets. Cook in 3/4 litres of boiling salted water for about 10 minutes. In the meantime peel and finely chop the onion. Grate cheese. Heat the oil. Sauté onions, minced meat and tomato paste for about 5 minutes, turning them over.
Season with salt and pepper. Drain the cauliflower and broccoli and collect the vegetable water. Melt the fat for the sauce. Sauté the flour in it. Add cream and 1/2 litre vegetable water while stirring constantly. Simmer at low heat for 3-5 minutes. Melt half the cheese in it. Season with salt, pepper and nutmeg. Stir in minced meat. Fill the florets into an ovenproof dish. Spread the sauce on top. Sprinkle with remaining cheese.
Melt half the cheese in it. Season with salt, pepper and nutmeg. Stir in minced meat. Fill the florets into an ovenproof dish. Spread the sauce on top. Sprinkle with remaining cheese. Bake in a preheated oven (electric: 200 °C/ gas: level 3) for about 20 minutes. Wash and chop the parsley and sprinkle over it