We need: 1 head of lettuce, 1 red bell pepper, fresh tomato, fresh cucumber, vinegar, oil, onion, salt.
Finely chop the onion, add salt, oil and vinegar. Cut tomatoes and fresh peppers into cubes, cucumber into rings, lettuce into strips. Arrange cucumber, lettuce, peppers and tomato over the onion.
Cover and leave to cool.
Mix everything well before serving.