Sour cream baked omelettes are surprisingly fluffy and can brighten up your nostalgia for an omelet from kindergarten a little.
Preheat oven to 180°C. For an omelette, fry flour with 2 tbsp. l. butter until light brown. Remove the pan from the heat, put the sour cream, mix thoroughly so that there are no lumps, and return to the fire. Simmer for 1 minute, transfer to a bowl and set aside.
For the filling, cut the onion into thin feathers. Heat a couple of tablespoons of oil in a deep frying pan (preferably in the one in which you will bake the omelet), put the onion. Sprinkle with a pinch of sugar, salt and fry quickly over high heat, stirring frequently. Sprinkle with zira and remove from heat.
Crack eggs into a bowl with sour cream, beat until smooth, salt and pepper. Return the pan with the onion to the heat, add a spoonful of oil, heat strongly.
Pour the omelette mass into a hot pan with onions and let it grab from below. Then move the omelette to the oven and bake at 160°C for 5-10 minutes or until the eggs on top are also set. Serve immediately.