Gather all ingredients.

Heat marinara sauce in a saucepan over medium heat until bubbling; reduce the heat to low and simmer until needed.

Meanwhile, whisk egg and milk together in a small bowl. Whisk bread crumbs and salt together in a second small bowl.

Dip each ravioli in milk mixture, then in bread crumbs to coat.

Heat 2 inches oil in a large, heavy pan until a small amount of breading sizzles and turns brown. Fry ravioli, a few at a time, until golden, about 1 minute per side. Drain on paper towels.

Sprinkle warm ravioli with Parmesan and serve immediately with hot marinara sauce on the side.