Cut the meat into cubes and fry with chopped onions and tomatoes. When a ready, add green beans in large pieces broken. Make hot water seasoned with salt and pepper and stew over low heat until soft and remains almost fat. Chopped mushrooms sauté until soft. Add tomato puree, egg and sour cream. Sprinkle with flour and leave little to stew. Mushrooms pour over the beans. Top sprinkle grated feta cheese and Bake small oven.