Pesto Pasta Salad

Ingredients: 12 ounces pasta (such as rotini, fusilli, or penne) 1 cup basil pesto (store-bought or homemade) 1 cup cherry tomatoes, halved 1/2 cup fresh mozzarella balls (bocconcini), halved 1/2 cup black olives, pitted and sliced 1/4 cup red onion, thinly sliced 1/4 cup pine nuts, toasted 1/4 cup grated Parmesan cheese Salt and pepper, to taste Fresh basil leaves, chopped (for garnish)