Heat Maultaschen in boiling salted water for 3-4 minutes, drain. Clean, clean and halve the mushrooms. Clean, wash and cut the peppers into pieces. Clean, wash and cut leek into strips. Cut Maultaschen diagonally in half.
Heat oil in a pan. Brown the Maultaschen in it and take them out. Fry the vegetables and mushrooms in the frying fat. Add Maultaschen and pour on stock. Cook for 5 minutes. Season to taste with salt and pepper. Wash and chop the chives. Stir into the sour cream except for a little bit for garnishing. Put the sour cream as a blob on the Maultaschen-Pfännle.
Cook for 5 minutes. Season to taste with salt and pepper. Wash and chop the chives. Stir into the sour cream except for a little bit for garnishing. Put the sour cream as a blob on the Maultaschen-Pfännle. Sprinkle the rest of the chives over it.