Bring the ravioli and eggs to room temperature before starting.
In a shallow bowl combine the panko, Italian seasoned bread crumbs, Italian seasoning, and kosher salt.
Whisk the eggs and milk together in a separate shallow bowl until smooth.
Dip each ravioli into the egg mixture, then dredge in the bread crumb mixture. Repeat a second time to double-coat each ravioli, and set them on a wire rack while you heat the oil.
Heat oil in a deep skillet or fryer to 350–375°F (175–190°C). Use enough oil to shallow- or deep-fry the ravioli, about 1–2 inches for pan frying or more for deep frying.
Fry the ravioli in batches for about 3 minutes, flipping halfway through, until golden brown and puffed.
Transfer cooked ravioli to a wire rack or paper towels to drain excess oil.
Serve warm or at room temperature with warm marinara sauce for dipping, if desired.