Zucchini Pasta with Roasted Red Pepper Sauce and Chicken

Ingredients

• salt and ground black pepper to taste
• 2 zucchini, cut into spirals using a spiral slicer
• 3 red bell peppers, chopped
• 2 cooked chicken breast halves, cubed
• 6 roma tomatoes
• 4 cloves garlic
• 1 cup tightly packed fresh basil leaves, chopped
• 2 yellow summer squash, cut into spirals using a spiral slicer
• 1 tablespoon grated Parmesan cheese, or to taste
• 1 large sweet onion, halved
• 3 tablespoons extra-virgin olive oil
• 1 can crushed tomatoes