Preheat oven to 425F. Spray 13- x 9-inch baking dish with cooking spray; set aside. Cook pasta according to package directions.
Heat oil in large skillet over medium-high heat while pasta is cooking. Add squash, salt and pepper. Cook 5 minutes, or until squash is crisp-tender and starting to brown, stirring frequently. Add spinach; cook 2 minutes, or until liquid evaporates, stirring frequently. Stir in spaghetti sauce and Alfredo sauce; cook 1 minute, or until heated through, stirring occasionally.
Drain pasta. Add to sauce along with half of the cheese; mix lightly. Spoon into prepared dish; top with the remaining cheese.
Bake 10 minutes, or until cheese is melted and mixture is heated through.
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