Step 1

For the sauce, stir together the Worcestershire sauce, ketchup, and soy sauce, and a pinch of pepper to taste. Set aside.

Step 2

Heat oil in deep-fryer to 350 degrees F (175 degrees C).

Step 3

Place flour and panko bread crumbs onto separate plates and season with salt and pepper. Place the beaten egg in a medium bowl. Dip flattened chicken pieces first into flour, then egg, and lastly bread crumbs.

Step 4

Fry breaded chicken breasts in preheated oil until golden brown and no longer pink in center, about 8 minutes. Transfer to a paper towel-lined plate to absorb excess oil. Slice chicken into thin strips and top with a drizzle of sauce and a sprinkling of sliced green onions. Serve remaining sauce on the side for dipping.