Clean, wash and dice the peppers. Peel and dice the onion. Fry the bell peppers in hot oil. Remove from the pan. Sauté onion in frying fat. Add minced meat and fry until crumbly.
Season with salt, pepper and paprika. Pluck the thyme leaves from the stalks. Add the paprika cubes to the minced meat, stir in tomato paste. Pre-cook the lasagne sheets in boiling salted water for about 5 minutes.
For the sauce, melt the fat, dust with flour and sauté while stirring. Gradually stir in milk and cream. Drain noodle plates and quench cold. Put some paprika mince in the middle of each lasagne plate, fold it over and put it into a flat casserole dish.
Pour gravy over it. Grate cheese finely and sprinkle over the casserole. Bake in a preheated oven (electric: 200 °C/ gas: level 3) for approx. 35 minutes.