Everyday Food editor Sarah Carey shows you how to make a showstopping vegetarian entree that will satisfy everyone at the table.
Preheat oven to 450 degrees. On a rimmed baking sheet, season cut sides of squash with salt and pepper, drizzle with 1 tablespoon oil, and turn cut sides down. Cover sheet tightly with foil and roast until tender, about 35 minutes.
Meanwhile, in a medium straight-sided skillet, heat remaining 2 tablespoons oil over medium-high. Add mushrooms, onion, and thyme; season with salt and pepper. Saute until mushrooms are golden, 8 minutes. Add rice and broth and bring to a boil; cover and reduce heat to low. Cook until liquid is absorbed, 20 minutes.
Remove squash from oven and heat broiler. Carefully scoop out 2 to 3 tablespoons flesh from each squash half and stir into rice; season with salt and pepper. Divide rice mixture among squash halves, sprinkle with Parmesan, and broil until melted, 2 minutes.
Got leftover stuffing from T-day? Use it here or try our gluten-free version. You'll need 4 cups.