Cut the cleaned and washed mushrooms into quarters, including the stems. Set aside 1 mushroom for later.
Put the mushrooms in a pot in 6 1/5 cups (1.5 L) salted water on the stove. Boil for 20 min.
Finely chop the set aside mushroom and braise it in a pan with the vegetable oil. Add the chopped carrot and pepper. Saute.
Add the spices. Boil 10 min. After removing from the heat, add the butter.
Stir well and serve.