Divide the chicken into four pieces each. Heat the margarine in a saucepan and fry the chicken pieces in it, season with salt and pepper.
Scald the tomatoes with hot water and peel, then quarter. Add to the meat with the tomato paste and the peeled, crushed garlic clove and stir.
Dust with flour. Add the chicken stock and white wine while stirring. Clean the shallots and mushrooms, cut in half and add to the saucepan. Cook the chicken pieces in a closed pot for 60 minutes. Taste well.