Onions should be cut into half rings and fry until tender.
Cut the mushrooms into small slices and also fry until tender.
Shrimp can be taken ready.
i had half a kilo of fresh-frozen shrimp. after defrosting and cooking in boiling salt water (literally 1 minute!) and cleaning them, there are just about 150 grams left.
For dressing, you need to take 2 tablespoons of thick cream, pepper well, squeeze a little (about a teaspoon) of lemon juice and salt.
season the cooled ingredients with the sauce and mix.