Roast the squash: Preheat your oven to 400°F (200°C). Slice the spaghetti squash in half lengthwise, remove the seeds, and place flat-side down on a baking sheet. Roast for 30 minutes or until tender. Let cool slightly, then use a fork to scrape the flesh into spaghetti-like strands.
Prepare your mix-ins: While the squash roasts, sauté your chosen veggies in a bit of olive oil until soft. Season with salt and pepper. This is where you build flavor.
Mix it all up: In a large bowl, combine the roasted squash, sautéed veggies, one jar of marinara sauce, shredded mozzarella and cheddar, chopped basil, salt, and pepper. Stir to mix everything well.
Assemble the bake: Pour the mixture into a greased oven-safe dish. Spread it evenly. Top with fresh tomato slices, the second jar of marinara, and a generous sprinkle of parmesan and extra cheese.
Bake until bubbly: Place in the oven at 375°F (190°C) and bake for 20–25 minutes, or until golden, bubbly, and irresistible.
Serve it hot: Let it rest for a few minutes, then dig in. Add more basil or cheese on top if you’re feeling fancy. It’s pizza night—with a nourishing twist.