Slice the tomatoes, cucumber and buns.

Beat eggs in a bowl, add salt and chopped spring onions.

Heat the non-stick pan, add butter. Let the butter melt and pour the beaten egg into it. Cook the omelet until well cooked for 3-5 minutes and flip it over. Switch off the heat. Set it aside.

Assembly the burger: smear mayonaisse and mustard sauce on the bun.

Add sliced cucumber, sliced cheese, sliced tomatoes.

Slice the omelet and fold it. Add on top of sliced tomatoes. Sprinkle little pepper and top it up with bun.