Boil mushrooms and finely chop. Peel onion and chop up. Chop the egg. Heat 1 tbsp. oil in a frying pan and fry mushrooms with onions. Mix with buckwheat porridge and egg. To prepare the dough, pour 0.75 cups of fiercely-boiling water into the sunflower oil, add flour and knead dough. Roll it out into a thin sheet. Cut into squares of 5x5 cm, put some filling on each of them, pinching like pelmeni. Heat the oven to 180 °C. Oil the dripping pan, place kundyumy on it in one layer and put in the oven for 15 minutes. Then put kundyumy in a clay pot, cover with hot mushroom broth, add sour cream, bay leaf, pepper and garlic. Cover with a lid and put back in the oven for 15 minutes. Dish kundyumy sprinkling with sauce.