Peel, wash and finely dice the carrots. Peel and finely dice the onion. Wash, clean, quarter and seed the tomatoes. Cut the flesh into small cubes. Peel garlic, press through a garlic press.
Heat the oil in a large frying pan. Fry the onion, garlic and carrots in it. Add the minced meat and fry vigorously for about 5 minutes. Season with salt, pepper and paprika. Stir in tomato paste and tomato cubes.
Deglaze with 100 ml broth and braise for another 5 minutes. In the meantime heat the fat in a pot, dust with flour, sweat it and gradually deglaze with 500 ml stock and cream. Bring to the boil while stirring.
Season to taste with salt and pepper. Cut mozzarella into slices, pluck basil leaves. Grease a lasagne dish, spread some sauce thinly on the bottom. Place 3 lasagne plates next to each other. Layer half of the chopped mass, sauce and cheese, 3 more leaves of lasagne, the remaining chopped mass, sauce, basil leaves, pine nuts and cheese.
Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 45 minutes. Serve garnished with cherry tomatoes.