Wash and clean the spinach leaves and sauté briefly until they collapse. Cut tomatoes into slices and sauté briefly. Cut the garlic into small pieces.
Mix the eggs with the sour cream and season with salt and pepper.
Heat a little oil per person in a non-stick pan (24 cm) and pour 1/4 of the mixture. Immediately cover one half of the spinach and tomatoes with 1/4 of the feta and sprinkle with the garlic pieces. Put a lid on the pan and fry the omelette until the surface is just creamy. Then fold up the omelette and continue frying for a short time.
Then slide onto a plate, sprinkle with chilli flakes and serve.