Pumpkin Mac and Cheese Baked in a Pumpkin

Name: Pumpkin Mac and Cheese Baked in a Pumpkin
Ingredients: 1 cinderella pumpkin or a few kobocha squash; 1 lb. macaroni pasta (gluten-free if desired); 1 1/2 cups pumpkin puree (canned is fine); 4 tablespoons favorite butter, divided; 1 (6 oz.) bag Horizon organic shredded cheddar; 1 cup favorite milk; 1 tablespoon Dijon mustard or 1 teaspoon ground mustard; 1/2 teaspoon nutmeg; 1 teaspoon garlic powder; 6 sage leaves, sliced; 1/2 cup panko breadcrumbs (gluten-free if desired); 1/4 cup Parmesan