Peel and wash the potatoes. Cook in boiling salted water for 15-20 minutes. In the meantime peel, wash and finely dice the carrots. Clean and wash spring onions, cut into small rings. Clean, wash and cut the cauliflower into small florets.
Set aside 1/4 of the florets for the next day. Cook the remaining florets in boiling salted water for about 8 minutes. Heat the oil. Steam carrot cubes until soft. Add minced meat. Stir-fry for about 5 minutes.
Season with salt and pepper. Stir in tomato paste and spring onions. Add 200 ml water, boil down again for about 2 minutes at high heat. Season to taste with salt and pepper. Put half of the potatoes aside for the next day.
Serve the remaining potatoes, cauliflower and bolognese sauce in portions.