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1
Preheat an oven to 375u00b0F.
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2
Place the squash cut-side down in a baking dish, and add enough water in the pan to come 1/2 an inch up its sides. Cover with aluminum foil and bake for 45 minutes, then turn over and cook, covered, until the the squash is very tender, an additional 15 minutes.
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3
Cool the squash slightly, remove the seeds with a spoon, then use a fork to gently pull the strands away from the peel. Toss with the butter while still warm, and season to taste with salt and pepper.
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4
While the squash is cooking, heat the reserved tomato oil in a large (12-inch) skillet over medium heat until shimmering. Add the sausage and cook until browned, breaking up as you go, about 8 minutes. Remove the meat to a bowl with a slotted spoon, leaving the fat behind in the pan.
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5
Add the garlic and kale to the skillet and cook, stirring often, until the garlic is very fragrant and the kale begins to soften, 2-3 minutes. Add the sun-dried tomatoes, chicken broth, and vermouth. Bring to a boil and cook until the kale is very tender and the liquid is nearly all reduced.
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6
Return the sausage to the skillet and add the Parmesan and basil. Toss well to combine and season to taste with salt and pepper. Serve with the warm spaghetti squash and top with the mozzarella.
