In a large mixing bowl, combine the chopped romaine lettuce, cherry tomatoes, cucumber, red bell pepper, red onion, mozzarella cheese, black olives, and parsley.

In a separate bowl, whisk together the olive oil, red wine vinegar, Dijon mustard, minced garlic, Italian seasoning, salt, and pepper until well combined.

Pour the dressing over the salad and toss gently to combine. Serve immediately.