4-6 pieces of boneless, skinless chicken breasts

• sour cream • flour • egg • chicken broth • bay leaf • ground beef • salt and pepper • onions, chopped • butter, divided • stalks celery, sliced • carrot, sliced • ground pork • leek, sliced • large onion, shredded • red bell peppers, cored • parsley root, sliced • Kaiser rolls, soaked in water