4cupspeeled and diced butternut squash(1 pound, 450g)
1½cupsvegetable broth(360mL)
½teaspoonground black pepper
Pinchnutmeg
1cupwhole milk(240mL)
1poundshort pastasuch as elbow macaroni, medium or large shells, or mini penne (450g)
8ouncessharp cheddar cheesegrated (226g)
1cupfreshly grated Parmesan Cheesedivided (55g)
1cupbreadcrumbs(80g)
Instructions
Preheat the oven to 375°F.
Heat a medium saucepan over medium heat. Add 2 tablespoons of the olive oil, the onion, and ½ teaspoon of salt. Cook, stirring frequently, for 5 minutes until softened. Add the garlic and cook for 2 more minutes.
Add the butternut squash, broth, black pepper, and nutmeg and bring to a simmer. Cover and reduce the heat to medium-low. Cook for about 15 minutes, until the squash is fork tender. Remove from the heat and transfer to a blender.
Add the milk. Vent the top of the blender to release steam and cover the opening loosely with a clean towel. Puree until smooth, about 30 seconds. (You can also blend the squash mixture in the pot using an immersion blender.)
Meanwhile, bring a large pot of water to a boil. Season generously with salt. Add the pasta and cook for 1 minute less than the package instructions. Drain the pasta and return it to the pot.
Return the squash mixture to low heat. Gradually add the cheddar and then ¾ cup of Parmesan cheese in a few batches, stirring until the cheese is completely melted between each addition. Pour the cheese sauce over the pasta in the large pot and stir gently to coat.
In a small bowl, mix the breadcrumbs with the remaining 2 tablespoons of olive oil, the remaining ¼ cups of Parmesan cheese, and ¼ teaspoon of black pepper. Stir well so that the oil coats all of the breadcrumbs.
Transfer the pasta to a lightly greased 9x13-inch casserole dish. Sprinkle the breadcrumb mixture all over the top. Bake for 15 to 20 minutes until bubbling on the sides and the breadcrumbs are toasted. Let rest for 5 minutes before serving.
Video
Notes
Use freshly grated cheese. Pre-shredded cheese contains anti-clumping agents that prevent it from melting into a creamy, smooth sauce.
Use an immersion blender. Instead of blending the butternut squash using a regular blender, you can use an immersion blender instead.
Make fresh breadcrumbs. To make breadcrumbs at home, remove the crusts from 3 to 4 slices of bread, then chop it into very fine crumbs. For larger pieces, you can crumble them with your fingers.
Skip baking the macaroni and cheese. Once the pasta and cheese sauce are combined, cook over medium-low heat for 3 minutes to reheat. Toast the breadcrumbs separately in a skillet with a couple of tablespoons of butter. Serve the mac and cheese in bowls, then sprinkle the toasted breadcrumbs over the top.
For an extra crispy breadcrumb topping, finish the mac and cheese under the broiler for 1 to 2 minutes.
Fresh herb garnish: Garnish the top of the casserole with fresh thyme, chopped sage leaves, or chopped parsley if desired.