If you want to toss this with spaghetti squash, keep the proportions the same, and toss with the roasted strands of one spaghetti squash: halve the squash crosswise, scoop out the seeds, season with salt and pepper, then roast cut-side down on a parchment-lined baking sheet for 45 minutes at 350ºF. Let cool for 10 minutes before removing the squash from the skin.