To make a tortellini stew with autumn vegetables, beans and grains, you'll need: 1 chopped onion, 2 chopped celery stalks, 1/2 cup chopped thyme, 1 tablespoon dried or fresh oregano, 3 tablespoons chopped parsley, and 1 teaspoon kosher salt. Toss the vegetables with the olive oil and season with salt and pepper. Cover and cook on medium-high heat until tender, about 30 minutes. Remove from the heat and let cool slightly.