Peel the onion. Halve, clean and wash the peppers. Chop onion and paprika roughly. Wash the meat, dab dry and cut into cubes. Wash potatoes thoroughly and cut into slices.
Heat the oil in a large frying pan. Fry the meat for approx. 10 minutes, turning it over. After about 5 minutes add potatoes. Add vegetables, beans and 2/3 of the sauce and bring to the boil. Season to taste with salt and pepper.
Pour into a greased large casserole dish. Grate cheese. Spread the crème fraîche and cheese on the casserole. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 30-45 minutes.
Add the rest of the sauce.