Cut the lamb into large cubes. Peel onions and garlic. Chop onions coarsely, chop garlic. Wash thyme, shake dry and pluck the leaves from the stalks
Heat the oil in a large frying pan, fry the meat in it while turning. Finally stir in onions, garlic and tomato paste and fry briefly. Add thyme, except for something to sprinkle, and season with salt and pepper. Pour on the stock, bring to the boil, cover and braise in the preheated oven on the lower shelf (electric cooker: 200 °C/ circulating air: 175 °C/ gas: see manufacturer) for approx. 1 1/2 hours.
Clean, wash and cut the beans diagonally into pieces. Potatoes wash, peel and also cut into large pieces. After approx. 30 minutes add the beans and potatoes to the meat and braise them together
Wash, clean and chop the tomatoes. After 1-1 1/4 hours add tomatoes and braise. Season the stifado with salt and pepper. Arrange in deep plates and sprinkle with feta cheese and remaining thyme