Make the pesto. Cook the pasta: Cook the pasta according to the package directions until al dente. Drain the pasta and rinse it with cold water to cool it down and prevent it from clumping.
2 cups homemade basil pesto
Combine ingredients: In a large bowl, combine the cooled pasta, cherry tomatoes, and mozzarella pearls.
Add the pesto: Pour the pesto over the pasta salad mixture. Gently toss everything together until the pasta, tomatoes, and mozzarella are evenly coated in the vibrant green sauce.
Season and serve: Season with salt and freshly ground black pepper to taste. For a beautiful finish, garnish with a few fresh basil leaves or a drizzle of balsamic glaze. Serve immediately or chill in the refrigerator for at least 30 minutes to allow the flavors to meld.