In a 5 quart pot, cook pasta according to package instructions; drain and rinse with cold water until cool to the touch. Set aside.
1 1/2 pounds 5-cheese tortellini
In a mixing bowl, combine yogurt, pesto, mayonnaise, olive oil, salt, and pepper. Set aside.
1 cup nonfat Greek yogurt, 1/2 cup basil pesto, 2 Tablespoons mayonnaise, 1 Tablespoon extra virgin olive oil, pinch of salt and pepper
When ready to combine, gently fold in the dressing to coat the tortellini, then fold in the tomatoes. Cover and refrigerate until ready to serve. Garnish with parmesan cheese and parsley.TIP - When you make the dressing, set aside 1/3 cup to toss the salad with just before serving, which is great if you're making it in advance.
Pre-cooked tortellini works excellent here, and only takes 4 minutes to boil. You can of course use whatever kind of tortellini you prefer, however. Other pasta shapes will also work! Just about anything with some grooves or ridges to it help the pesto cling. Think cavatappi, rotini, and even bowtie (farfalle).