Slice the pumpkin into strips, cut the onions into cubes, peel the horseradish and grate finely.
Let the sugar turn golden brown in a pan, deglaze with vinegar, add butter and let it froth up once. Briefly sauté the onions in it. Add the pumpkin strips and sauté for about 5 minutes. Stir in tomato paste and sour cream, season with salt, pepper, vegetable stock powder and curry and cook for another 3 minutes. Finally stir in the horseradish.
It goes well with fried potatoes, duck breast or leg or game.