You will need:
*3 cups butternut squash (about 1 pound), cubed and peeled
*1 1/4 cups lower-sodium chicken broth
*1 1/2 cups skim milk
*2 garlic cloves
*1 teaspoon kosher salt
*1/2 teaspoon freshly ground black pepper
*2 tablespoons nonfat Greek yogurt
*1 1/4 cups (5 ounces) shredded Gruyère cheese
*1 cup (4 ounces) grated pecorino Romano cheese
*1/4 cup (1 ounce) finely grated fresh Parmigiano-Reggiano cheese, divided
*1 pound uncooked pasta (I used one 13.25 oz. box of whole wheat rotini)
*2 tablespoons chopped fresh parsley (omitted)
1. Preheat oven to 375°.
2. Combine squash, broth, milk, and garlic in a medium saucepan over medium-high heat. Bring to a boil. Reduce heat to medium for about 25 minutes until squash is tender when pierced with a fork. Remove from heat.
3. Meanwhile, cook pasta according to package directions, omitting salt, drain well.
4. Carefully, place the hot squash mixture in a blender. (I am lazy with blending recipes and always use my immersion blender!) Add salt, pepper, and Greek yogurt. If you use a blender, remove the top's center to allow heat to escape. Place a clean towel over opening in blender lid to help prevent splattering. Blend until smooth.
4. Place blended mixture in a bowl. Stir in Gruyère, pecorino Romano, and Parmigiano-Reggiano until combined. Add pasta to squash mixture, and stir until combined. Sprinkle with parsley if desired, and serve immediately.