In a large mixing bowl, combine the romaine lettuce, cherry tomatoes, cucumber, red bell pepper, and red onion.

Add the garbanzo beans, mozzarella cheese, pepperoncini, and parsley to the bowl.

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

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