Mushroom sauce.

Ingredients: 

5 - 7 ea dried mushrooms.
2 onion
1 tbsp flour
salt, 
oil to fry.
greenery to taste.

Method: 

1. Mushrooms to soak into the water for 4 - 5 hours. Wash carefully and cook until done. 

2. Blanch onion in oil until golden, add flour and fry until golden. Gradually add to the skillet a little mushroom's broth, stirring, to create a smooth sauce. Mix very carefully.

3. This mixture add to mushrooms broth, stirring, cook 7 - 10 minutes. Add greenery.

4. Serve hot with potatoes cutlets.