Onions peel and in fine cubes cut. Knead minced meat, half onions, mustard, breadcrumbs, milk and egg. Season with 1 teaspoon salt and pepper. Wash and clean the mushrooms and cut them in half or quarters depending on size.
Wash and clean the beans and possibly halve them. Cook the beans in boiling salted water for 10-12 minutes. Cut bacon into strips. Sear crisply in a pan without fat. Add the remaining onions and mushrooms to the bacon and fry.
In the meantime form 8 meatballs from the minced meat mixture. Heat the oil in a pan and fry the meatballs for about 8 minutes, turning them over. Wash the thyme, shake dry and pluck the leaves from the stalks.
Pour cream to the bacon and bring to the boil. Drain the beans, add the thyme and simmer for 1-2 minutes. Season to taste with pepper. Arrange vegetables and meatballs on plates.