Slice the cucumber and tomato thinly, and cut the sausages lengthwise into halves.

Heat a pan over medium heat, add cooking oil, and fry the egg with a sprinkle of salt and pepper. Remove from the pan.

Using the same pan, cook the sausages until golden brown on both sides.

Lay a sheet of plastic wrap on a cutting board, spread out the lettuce leaves, and layer cucumber, tomato, egg, sausages, and cheese on one side.