Wash the chicken, pat dry and cut into portions. Grate with salt and pepper. Heat 30 g of butter in a frying pan and fry the pieces on all sides until golden brown.
Transfer to a deep microwave-safe dish, pour in 100 ml of water, cover and microwave for 20 minutes. at 100% power.
Wash mushrooms, dry and cut into slices. Heat up the remaining oil. Fry the mushrooms over high heat, 8 minutes. Add lemon juice, salt and pepper to taste, cook for another 5 minutes.
Take the chicken out of the oven. Drain the juice that stands out during frying into a bowl. Add sour cream and yolk. To stir thoroughly.
Add the fried mushrooms to the bowl with the chicken. Pour in prepared sauce.
Return dish to microwave. Cook for 10 more minutes. at 100% power. Serve with fresh salad greens and pickled vegetables.