Peel the potatoes, onion and garlic. Dice the potatoes, cut the onion into rings and finely chop the garlic clove. Heat the oil in a non-stick pan and sauté the onions and garlic until translucent.
Add the potato cubes and sauté briefly. Pour in the vegetable stock and tomato juice, season with cayenne pepper, caraway seeds and curry powder and cook covered over medium heat for about 10 minutes.
Clean and dice the peppers, add to the potatoes and cook for another 10 minutes. Add sour cream and season with salt and pepper to taste.