1Heat oven to 350°F. Spray 13x9-inch (3-quart) glass baking dish with cooking spray. Spread frozen ravioli in baking dish. Top with remaining ingredients except croutons; mix slightly to coat ravioli.
2Cover baking dish with foil. Bake 50 minutes; stir. Sprinkle with croutons. Bake uncovered 10 to 15 minutes longer or until bubbly around edges and thoroughly heated.