Preheat oven to 375°F. Spray 13 x 9-inch baking dish with nonstick cooking spray.
Prepare pasta as label directs; drain and return to saucepot.
Heat oil in a large skillet over medium-high heat.
Add carrots, onion and cauliflower; cook 8 minutes or until tender, stirring occasionally.
Add mushrooms and spinach; cook 6 minutes or until mushrooms are tender and spinach wilts, stirring occasionally.
Add garlic, seasoning and salt; cook 1 minute, stirring frequently.
Stir in marinara; transfer to saucepot with pasta and toss.
Transfer pasta mixture to prepared dish; sprinkle with cheeses and cover with foil.
Bake pasta 20 minutes; remove foil. Bake 10 minutes or until cheese is golden brown.