Preheat the oven to 375°F (190°C) and lightly spray a baking sheet with nonstick cooking spray.
Cook the refrigerated cheese ravioli according to the package instructions, drain in a strainer, and set aside to cool slightly.
In a shallow bowl, combine the panko, Italian seasoning, and grated Parmesan; mix until evenly combined.
Place the lightly beaten egg white in another shallow bowl.
Dredge each ravioli first in the egg white, letting excess drip off, then press into the panko mixture to coat both sides well.
Arrange the coated ravioli on the prepared baking sheet in a single layer, spray the tops lightly with nonstick cooking spray, and bake until the coating is light golden brown, about 10–12 minutes.
Serve the baked ravioli hot with warmed marinara sauce for dipping.