Preheat oven to 425 degrees Fahrenheit. Spray a baking sheet with oil spray.

In a small bowl, whisk egg, milk, and salt.

In a flat dish, combine bread crumbs and cheese.

Dip frozen ravioli in egg mixture, then dredge in bread crumbs until coated.

Place on tray and repeat with remaining ravioli.

Spray tops with oil spray and bake for 15–20 minutes.

Serve hot with marinara sauce.