Peel and finely chop the onion. Heat oil in a pot. Sauté diced onion for about 2 minutes. Knead minced meat, egg, breadcrumbs, mustard and onion cubes. Season with salt and pepper. Form approx. 12 dumplings from the minced meat mixture
Bring the stock and bay leaf to a boil in a wide pot. Add the meatballs to the stock, bring to the boil briefly, cover and cook over a low heat for about 15 minutes
Meanwhile roast the ham in a pot for about 1 minute. Put 1 tbsp aside for garnishing. Add butter and melt. Add flour and sweat it for about 1 minute while stirring. Pour 500 ml broth from the meatballs into the roux while stirring and bring to the boil. Let simmer for about 5 minutes. Add capers and cream, bring to the boil, season with salt and pepper. Add meatballs to the sauce and heat
In the meantime, cook the rice in boiling salted water according to the instructions on the packet. Clean and wash spring onions and cut into fine rings
Arrange meatballs with sauce on plates, garnish with caper apples. Sprinkle with roasted ham and spring onion rings. Serve with rice