Creating Garlic Parmesan Stuffed Spaghetti Squash with Chicken & Spinach is a simple process. Just follow these clear-cut steps to achieve flavor perfection:

1. Preheat your oven to 400°F (200°C).
2. Cut the spaghetti squash in half lengthwise and scoop out the seeds.
3. Drizzle the inside of each half with olive oil and season with salt and pepper.
4. Place the squash halves cut-side down on a baking sheet and roast for 30-35 minutes or until tender.
5. While the squash is roasting, heat olive oil in a skillet over medium heat.
6. Add minced garlic and sauté for about 1 minute until fragrant.
7. Add the diced chicken to the skillet, seasoning with salt, pepper, and red pepper flakes if desired. Cook for 6-8 minutes until fully cooked.
8. Stir in the chopped spinach and continue cooking until wilted.
9. Remove the skillet from heat and mix in half of the Parmesan cheese until well combined.
10. Once the spaghetti squash is done roasting, flip it over and use a fork to scrape out the flesh to create spaghetti-like strands.
11. Mix the spaghetti squash strands into the chicken and spinach mixture until evenly combined.
12. Stuff the squash halves with the chicken-spinach mixture, topping each with the remaining Parmesan cheese.
13. Return stuffed squash to the oven and bake for an additional 10 minutes until the cheese is melted and bubbly.
14. Remove from the oven and let cool for a few minutes before serving.
15. Garnish with fresh basil if desired for an added touch.

By following these steps, you’ll have an indulgent yet nutritious meal ready to impress your family or guests!