400 g field mushrooms
1 tblsp vegetable oil
0.5 tsp 2% citric acid
Scrub and clean the mushrooms, remove the thin film from the caps. Wash the mushrooms, add hot water to cover, add thinned citric acid and boil until done.
Slice the boiled mushrooms and onions in half rings, season with vegetable oil, salt and pepper. Heap in a bowl and decorate with edges of eggs.