Potato salad

1. Put the mushrooms in a saucepan, cover with about half a liter of water and let them boil for a while.
I put all the vegetables and 1.5 liters of water in a large pot to boil. I add the pre-cooked dried mushrooms, the water they were cooked in, and the broth. I let it cook for about a quarter of an hour.
and in the meantime, I make the roux – I heat the butter in a saucepan, add the flour and stir until golden brown. I pour the still hot roux into the boiling soup, season with salt, pepper and add the marjoram.
2. Finally, I remove the celery, onion and whole carrot from the soup. I add the crushed garlic and beat the egg into the mashed potatoes with a fork. I add a handful of fresh parsley.
and it's done.