Italian Sausage Spaghetti Squash

1 . Stage

Preheat oven to 400 degrees F (200 degrees C). Line a baking sheet with parchment paper. Place squash, cut sides down, on baking sheet.

2 . Stage

Bake squash in the preheated oven until it starts to soften, about 25 minutes. Reduce oven temperature to 350 degrees F (175 degrees C) and continue baking until easily pierced with a knife, about 25 minutes more. Remove from the oven and cool until easily handled.

3 . Stage

Cook sausage in a large skillet over medium heat until browned, about 5 minutes; remove from skillet. Add onion, celery, and carrot to the skillet; cook and stir in sausage drippings until starting to soften, about 5 minutes. Stir cooked sausage, diced tomatoes, chicken broth, tomato paste, and garlic into the skillet. Simmer sauce until flavors combine, about 15 minutes.

4 . Stage

Use a fork to scrape insides of squash into spaghetti strands. Transfer strands to a 9x13-inch casserole dish. Spoon sauce over strands and stir to combine. Cover with mozzarella cheese.

5 . Stage

Bake in the preheated oven oven until bubbly and golden brown, about 25 minutes.