Creating Spaghetti Squash Primavera is a breeze if you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 400°F (200°C).
2. Prepare the Squash: Cut the spaghetti squash in half lengthwise. Scoop out the seeds and stringy bits.
3. Roast the Squash: Place the squash halves cut side down on a baking sheet lined with parchment paper. Roast in the oven for 30-40 minutes, or until the flesh is tender.
4. Sauté the Vegetables: While the squash is roasting, heat olive oil in a large skillet over medium heat. Add the diced onion and garlic, sautéing until translucent, about 3-5 minutes.
5. Add Bell Pepper and Squash: Stir in the bell pepper, zucchini, and yellow squash. Cook for another 5-7 minutes until slightly softened.
6. Incorporate Tomatoes and Spinach: Add the cherry tomatoes and spinach to the skillet. Cook until the spinach wilts and the tomatoes soften, about 3-4 minutes.
7. Season the Mixture: Sprinkle Italian seasoning, salt, and pepper over the vegetables, stirring to combine.
8. Scrape the Squash: Once the spaghetti squash is roasted, use a fork to scrape the flesh into strands and add it to the skillet with the vegetables.
9. Combine Ingredients: Toss everything together until well combined. Adjust seasoning if necessary.
10. Serve Immediately: Remove from heat and serve hot, garnished with fresh basil and grated Parmesan cheese if desired.

These steps will guide you in creating this incredible dish effortlessly!