Preheat oven to 425 degrees. Place zucchini, squash, bell pepper, onion and mushrooms on a rimmed 18 by 13-inch baking sheet.
Drizzle veggies with olive oil and season with salt and pepper then toss to evenly coat.
Roast in preheated oven 10 minutes, then remove, add tomatoes and garlic and toss.
Roast 10 minutes longer or until veggies are tender then remove add spinach and toss, roast 1 minute longer or until spinach has wilted.
While veggies are roasting cook tortellini according to directions listed on package and drain.
Pour drained tortellini into a large bowl. Add in roasted veggies and pesto and season with salt and pepper to taste then toss to evenly coat.
Serve warm, top each serving with parmesan cheese.
