You can't know how incredible this gluten-free pasta with roasted squash and bacon is until you make it. So, we strongly recommend you drop everything and do just that. It's truly one of the most addictive pastas we've ever made, and the melty, sweet red onions put it over the top.
Preheat the oven to 450°F. On a large, rimmed baking sheet, toss the squash, onion, and bacon with 1 tablespoon of the oil and spread in an even layer. Sprinkle with the chopped sage, 1/2 teaspoon salt, and pepper to taste. Roast, tossing a few times during cooking, until the squash is tender and the bacon and onions are nicely browned, 25 to 30 minutes.