Wash the meat, dab dry and cut in half. Clean, wash and chop the zucchini and peppers. Peel and chop onions and garlic.
Heat the oil in a large frying pan and fry the meat for about 4 minutes on each side. Season with salt and pepper and remove. Fry onions, garlic, zucchini and peppers in hot frying fat for about 8 minutes.
Season with salt and pepper. Stir in tomato paste and sweat briefly. Stir in cream and 1⁄4 l water. Bring to the boil and simmer for 3-4 minutes. Season to taste.
Finely grate the cheese. Put the meat in a large casserole dish. Spread ratatouille vegetables and sauce over it. Sprinkle with cheese. Bake in a hot oven (electric cooker: 225 °C/circulating air: 200 °C/gas: see manufacturer) for about 10 minutes.