Carefully remove the stems of the mushrooms without damaging the caps. Cut the boiled chicken into small pieces. In a separate container, mix the chicken and sour cream, add salt and pepper to taste. Mix the filling thoroughly.
Place the champignons on a baking tray, previously greased with oil. Fill the mushroom caps with the prepared filling.
Wrap each champignon with a slice of bacon. Place in the oven preheated to 190 ℃, bake for 15-20 minutes.
Transfer the cooked hot champignons to serving plates. Garnish with fresh spinach or green salad leaves and whole or sliced cherry tomatoes.