Prepare all food and work area for cooking. Wash the champignons and remove any dirt. Rinse the dill and dry with a paper towel.
Rinse the eggs and break them into a deep plate.
Add flour to the eggs and pour in milk. Beat the products until smooth. You can add salt and pepper.
Finely chop the dill and add it to the egg mixture. Mix thoroughly.
Cut the champignons into thin slices and fry in vegetable or olive oil for 3-4 minutes. Lightly salt the mushrooms.
Pour the egg mixture over the mushrooms and cover with a lid. Cook the omelette over low heat for 5 minutes.
You can sprinkle the omelette with cheese when it is almost ready. Once the cheese has melted, remove the mushroom omelette from the heat.
Garnish the dish with fresh spinach leaves. Omelette with champignons will go well with pesto sauce and sun-dried tomatoes.