Chop all vegetables.
Melt sugar in a pot. Add onions and sauté, stirring continuously. Add bell peppers and carrots, and sauté briefly. Add vegetable stock and simmer for approx. 5 – 10 min.
Add broccoli and tomatoes, and simmer for approx. 5 min.
Add sauerkraut. Season with salt and pepper, and garnish with parsley.