Wash all fresh vegetables thoroughly.
Chop the romaine lettuce into bite-sized pieces and place in a large mixing bowl.
Halve the cherry tomatoes and add them to the bowl.
Dice the cucumber and bell pepper, then mix them in.
Thinly slice the red onion and add to the salad.
Include the sliced olives and cubed mozzarella cheese.
Chop the fresh parsley and sprinkle it over the salad.
In a small bowl, whisk together olive oil and balsamic vinegar.
Pour the dressing over the salad and toss gently to combine.
Season with salt and pepper to taste before serving.