Preheat the oven to 375°F (190°C). Line a baking sheet with parchment paper.
Whisk the egg and milk together in a shallow bowl until blended.
In another shallow dish, combine the Italian bread crumbs and grated Parmesan.
Dip each thawed ravioli first into the egg mixture, letting excess drip off, then press into the bread crumb mixture to coat on both sides.
Place coated ravioli in a single layer on the prepared baking sheet.
Lightly spray the tops of the ravioli with cooking spray to help them brown.
Bake for 12–15 minutes, or until golden brown and crisp. Serve warm with marinara or pesto.
Air fryer option: arrange coated ravioli in a single layer and cook at 350°F (175°C) for 7–9 minutes.