Rinse the wheat and soak overnight in the refrigerator in a good 1 l of cold water
Rinse off the porcini mushrooms. Pour approx. 300 ml of hot water over them and soak for approx. 30 minutes. Peel onions and garlic and dice finely. Clean and wash the mushrooms and cut them in half or quarters depending on size. Drain porcini and wheat separately, collect the soaking water each time. Chop porcini mushrooms
Heat the oil in a pot. Sauté the mushrooms in the oil. Season with salt and pepper. Add onions and garlic and fry until transparent. Add thyme, porcini mushrooms and wheat briefly. Gradually stir in mushroom water, 600-700 ml wheat soaking water and stock. Bring everything to the boil, cover and cook over a low heat for about 1 hour. Stir from time to time
From the Parmesan some chips, grate the rest. Peel, wash and slice the carrots. Stir into the wheat about 12 minutes before the end of the cooking time. Stir in grated Parmesan and sour cream, season to taste. Sprinkle with the parmesan shavings and garnish