Wash the potatoes and cook in water for about 20 minutes. Quench and remove the skin. Let the potatoes cool down, then cut into slices
Wash, clean and slice the tomatoes. Peel onions and garlic, dice finely. Fry garlic in hot oil. Add minced meat and fry well. Season with salt, pepper and tomato paste
Heat the fat. Sauté onions in it. Dust with flour and sweat. Add 1/2 l water and cream. Stir in broth. Bring everything to the boil while stirring. Grate cheese. Melt a third in the sauce. Season to taste with salt, pepper and herbs
Layer the potatoes, minced meat, tomatoes and sauce in an ovenproof dish. Finish with sauce and sprinkle with remaining cheese. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C / gas: level 3) for approx. 35 minutes