Clean the cauliflower, wash it and cut it into florets. Cook in boiling salted water for about 7 minutes, then drain. Meanwhile peel onion and garlic and dice finely. Heat the olive oil. Brown the onion and garlic. Add minced meat, also fry well.
Season with salt, pepper and paprika. For example, fill into a springform pan (approx. 18 cm Ø) and press down firmly. Drain the mozzarella and cut into slices. Spread half of it on the chopped layer. Mix crème fraîche and egg. Also season with salt and pepper and spread on the cheese. Press the cauliflower florets slightly in. Cover with remaining mozzarella. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 20 minutes. Clean, wash, quarter and seed the tomato. Cut the flesh into small cubes. Wash chives, cut into small rolls.
Cover with remaining mozzarella. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 20 minutes. Clean, wash, quarter and seed the tomato. Cut the flesh into small cubes. Wash chives, cut into small rolls. Carefully cut the cauliflower au gratin into cake pieces. Sprinkle with diced tomatoes and chives. Serve garnished with chervil