In a large bowl, combine pasta, fresh mozzarella, basil, and sun-dried tomatoes with a small amount of oil from the jar. Save whatever oil is left in the jar to moisten the pasta salad later.
In a small bowl, whisk together 2 teaspoons of Balsamic vinegar, olive oil, garlic, salt, dried basil and pepper to taste. Pour over the pasta and stir everything gently to coat.