Italian Tortellini Salad with Salami and Mozzarella

1 package (9 ounces) cheese tortellini
1 cup cherry tomatoes, halved
1 cup mozzarella balls, halved
1/2 cup sliced salami, cut into strips
1/4 cup red onion, thinly sliced
1/4 cup fresh basil leaves, chopped
1/4 cup olive oil
2 tablespoons balsamic vinegar
Salt and pepper to taste