Butternut Squash Pasta Casserole

Name: Butternut Squash Pasta Casserole
Ingredients: 1 pound short pasta, such as penne, gemelli or trofie; 2 tablespoons extra-virgin olive oil; 1 medium onion, chopped; 2 cups frozen diced butternut squash; Kosher salt and freshly ground black pepper; 1 quart chicken or vegetable stock; 1 cup frozen peas; 1 jarred roasted red pepper, finely chopped; One 4-ounce log fresh goat cheese, broken into small pieces; 1 small head cauliflower, grated on the large holes of a box grater; 1 cup shredded mozzarella; 1/4 cup grated Parmesan; 3 tablespoons minced fresh parsley