Cut tomatoes in a half(if you are using small tomatoes or cherry tomatoes)otherwise cut into a medium dice.
Peel and seed one cucumber and dice.
Assemble diced avocado and mozzarella cheese in a bowl.
Whisk together olive oil, fresh parsley and lemon juice - pour over salad.
Dust lightly with kosher salt and black pepper.
Toss to coat and serve.