Step 1

Heat oven to 425˚F. Combine the squash, onion, and rosemary in a roasting pan. Toss and coat with the olive oil. Roast until the squash is tender and starting to brown, 25 to 35 minutes. Stir halfway through cooking.

Step 2

Cook pasta according to package, drain, and set aside. Heat a pot or skillet, large enough to hold pasta and squash, over medium heat. Add the walnuts to the try skillet and lightly toast, 2 minutes or so. Add in the butter to melt.

Step 3

Once butter is melted, stir in the pasta, squash, and parmesan cheese. Toss until everything is well combined. Taste and add salt/pepper as desired. Divide into two bowls and top with a extra sprinkle of cheese.