Preheat your oven to 400°F (200°C). Cut the spaghetti squash in half lengthwise and scoop out the seeds.
1 spaghetti squash
Drizzle the inside of each half with olive oil and season with salt and pepper.
1 tbsp olive oil, ⅛ tsp salt, 1 pinch pepper
Place the squash halves cut side down on a baking sheet lined with parchment paper.
Roast in the preheated oven for about 40 minutes, or until the squash is tender and easily pierced with a fork.
While the squash is roasting, heat a large skillet over medium heat and add the ground turkey or chicken. Cook until browned, breaking it up with a spoon as it cooks. Drain any excess fat if necessary.
1 pound turkey
Add the chopped onion, garlic, carrot, celery, and bell pepperi to the skillet. Cook until the vegetables are softened, about 5-7 minutes.
1 small onion, 2 cloves garlic, 1 medium carrot, 1 stalk celery, 1 red bell pepper
Stir in the crushed tomatoes, oregano, basil, thyme, and red chili flakes (if using). Season with salt and pepper.
14 oz tomato, 1 tsp oregano, 1 tsp basil, ½ tsp thyme, ¼ tsp red chili flakes, ¼ tsp salt, ⅛ tsp pepper
Bring the sauce to a simmer, reduce the heat to low, and let it cook for about 20-25 minutes, stirring occasionally, until the flavors meld together.
Using a fork, begin to loosen out the spaghetti “strands” from the squash. Pour about 1 ½ cup of the meat sauce over each spaghetti squash half and top with shredded cheese.
⅓ cup cheddar cheese
Broil for about 3-4 minutes or until the cheese is bubbly and melted. Remove from the oven, garnish with fresh basil, and serve.
1 tbsp basil