Peel and halve the onion and cut into fine strips. Wash the tomatoes and cut into slices. Clean, wash, shake dry and cut into strips. Peel cucumber, quarter lengthwise and cut into pieces. Wash parsley, shake dry and chop finely.
Mix vinegar, salt and pepper. Fold in the oil. Mix onion, tomatoes, cucumber, lettuce, pepperoni, parsley and vinaigrette. Serve with olives, fresh flat bread and pickled feta.