Wash the green onion, chop it finely. Remove the wrapping film from the sausage, cut it into small cubes.
Grate hard cheese on a fine grater.
Put chopped sausage and onion in a bowl with hard cheese.
Beat in a chicken egg, add salt and pepper.
Stir the filling with a spoon.
Place on bread slices and spread evenly.
Put the pan on medium heat, after 30 seconds put the prepared sandwiches, cover the pan with a lid. Reduce fire to a minimum and fry sandwiches for 2-3 minutes.