
Using a whisk, beat the egg whites until lightly foamed. Add a little salt. Pour in the milk and beat the foam again.

Cook the omelette using steam. Prepare a steamer or multicooker. Pour the egg mixture into the pan. Do not fill the pan to the very top, as the omelette will rise during cooking. Pour water into the steamer. Install the grate, place the pan with the protein mixture on it. Cover the steamer with a lid. Cook for 15 minutes. Place the omelette on a plate, sprinkle with grated cheese.