German Meatballs With Red Cabbage

• 1 egg (beaten)
• 1 sauerkraut (fresh)
• 1 apples cored
• 700 gr beef chuck (lean ground)
• 400 gr cabbage (red chopped)
• 240 ml chicken broth
• 100 gr apple (finely chopped)
• 60 gr onion (chopped)
• 55 gr bread crumbs
• 30 ml wine vinegar (red)