Wash the potatoes thoroughly. Cook in boiling water for about 20 minutes. Meanwhile peel carrot and onion and dice finely. Wash, clean, quarter and seed the tomatoes. Cut the flesh into small cubes.
Heat the oil. Fry onion and carrot cubes and minced meat for 5 minutes over high heat. Season with salt, pepper and dried herbs. Stir in tomato paste and tomato cubes. Melt butter. Sauté flour in it.
Deglaze with cream and stock. Bring to the boil while stirring constantly. Season with salt and pepper. Stir in cheese. Fill potatoes into an ovenproof dish. Spread the mince mixture and sauce on top.
Bake in a preheated oven (electric range: 200 °C/ convection oven: 175 °C/ gas: level 3) for 15-20 minutes until golden brown. Serve garnished with fresh herbs.