How to make
Peel the cucumber and cut it into cubes. Cut one tomato into larger pieces and the other into smaller ones. Mash the cabbage lightly with salt.
In a large bowl, make a bed of lettuce leaves. Add the cabbage, the tomatoes (the small ones), carrots, cucumber, corn and gently stir. Top with tuna, add a few larger slices of tomato and some olives.
Pour over with a salad dressing made of the lemon juice, vinegar and olive oil.