Chop the spring onions, boiled ham, cocktail tomatoes and radishes into small pieces. Sauté the ingredients with a little oil in a pan.
Pour the egg into a separate pan and fry until golden brown.
Fill the omelette with the steamed vegetables and ham. Put some sprinkled cheese in the omelette and let it melt slightly. If you like, you can serve the omelette decorated with tomatoes.