Pre-heat oven at 400°F. Spray a baking pan lightly with cooking spray. In a shallow dish whisk together egg and milk. In a separate shallow dish, combine panko, Old Bay seasoning, parsley and olive oil. Dip each filet in egg, then roll well in the panko mixture. Place filets in a single layer onto prepared pan. Bake 10-12 minutes, until flaky and golden brown.