01 - Cook penne pasta in a large pot of salted boiling water following package instructions until al dente. Drain well, reserving 1/2 cup of the cooking liquid.
02 - Combine halved cherry tomatoes, minced garlic, and torn basil leaves in a large mixing bowl.
03 - Add warm, drained pasta to the bowl. Drizzle with extra virgin olive oil and gently toss to blend. If needed, loosen with a small amount of reserved pasta water.
04 - Add mozzarella pieces and fold gently, allowing cheese to soften slightly from the warmth of the pasta.
05 - Season with salt and freshly ground black pepper. Stir in chopped parsley if using.
06 - Divide onto serving plates and drizzle with balsamic glaze. Garnish with additional basil if desired.
07 - Present immediately, either warm or at room temperature.