Onions, butter, consume, borowik (prawdziwek)
Can anyone help?
Ok - I'm assuming it was a clear based soup since it doesn't have any cream or milk in it.
First, crumble the borowiki (1/4 to 1/2 cup) and rinse under water. Put them in a pot with about 2 cups of water and simmer until it reduces to 1 cup of liquid. Finely dice a small onion and saute it in butter until it is soft and golden. At this point I would thicken this soup with about 2 tablespoons of flour mixed into the butter/onion mixture. Then add the bulion (chicken or beef is okay) slowly, mixing with a whisk until there are no flour lumps left. Stir in the mushrooms and liquid and salt and pepper to taste. Simmer for 20 - 30 minutes.