Combine first 6 ingredients in a shallow dish. Combine soy sauce and egg white in a medium bowl, stirring with a whisk. Place panko in a shallow dish.
Dredge pork in flour mixture; dip in egg mixture. Dredge in panko. Heat oil in a large nonstick skillet over medium-high heat. Add pork to pan; cook 1 minute on each side. Place pork on a baking sheet coated with cooking spray. Bake at 450° for 6 minutes or until done.
To prepare dressing, combine onions and the remaining ingredients. Serve dressing with pork.