1 tablespoon olive oil
1/2 cup chopped onion
3 cloves garlic, minced
2 bay leaves
Dash of crushed red pepper flakes
2 (28 oz) cans diced tomatoes
1 (32 oz) container vegetable broth
1/4 cup chopped fresh basil
Salt and freshly ground black pepper, to taste
1/2 cup plain Greek yogurt
2 (9 oz) packages fresh or frozen cheese tortellini (we use Buitoni)
Grated Parmesan cheese and fresh basil, for garnish, optional