Peel and chop the onion. Knead with minced meat, egg, breadcrumbs, mustard, 1 teaspoon salt and 1⁄2 teaspoon pepper. Shape into 12 meatballs. Fry in hot oil for about 6 minutes on each side.
Clean, wash and quarter the cabbage. Peel, wash and slice carrots, cook in boiling salted water for about 6 minutes. Cut cabbage into wide strips from the stalk, cook for about 2 minutes. Drain the vegetables, collect the cooking water. Melt butter and sweat flour in it.
Stir in cream and 1⁄4 l cooking water, bring to the boil. Add vegetables, simmer for about 3 minutes, season to taste. Arrange everything. Boiled potatoes taste good with it.