Peel onions and cut them into rings. Clean, wash and cut the cucumber into large pieces. Clean, wash and cut tomatoes into large pieces. Clean, wash and chop lettuce. Cut olives in half. Chop feta cheese roughly. For the vinaigrette mix vinegar, lemon juice, salt, pepper and sugar.
Fold in the oil. Wash parsley, dab dry and cut into strips. Clean, wash and roughly dice the peppers. Mix onions, cucumber, tomatoes, lettuce, olives, bell peppers, pepperoni and feta cheese. Drizzle vinaigrette over it and mix. Serve on plates sprinkled with parsley and pepper