Preheat oven (electric cooker: 250 °C/circulating air: 225 °C/gas: see manufacturer). Wash meat, dab dry and cut in half crosswise. Wrap 1 bacon slice around each. Peel and halve onion and cut into rings.
Wash cherry tomatoes.
Heat the oil in a pan. Brown the meat in it for about 5 minutes. Season with salt and pepper and remove. Briefly sauté the onion in hot frying fat. Steam cherry tomatoes for about 2 minutes.
Add the chopped tomatoes and oregano and bring to the boil. Season with salt, pepper and sugar and simmer for about 3 minutes.
Put tomato sauce and meat in a wide casserole dish and sprinkle with cheese. Gratinate in a hot oven for about 10 minutes. Fresh baguette tastes good with it.