1. Combine soy sauce and ginger in a small bowl; set aside.
2. Combine panko, wasabi powder, and parsley in a shallow dish.
3. Coat steaks generously with cooking spray, and dredge in panko mixture. Coat steaks again with cooking spray; dredge in panko mixture.
4. Heat 1 1/2 teaspoons oil in a large nonstick skillet over medium-high heat. Add steaks; cook 2 to 3 minutes on each side or until desired degree of doneness, adding remaining 1 1/2 teaspoons oil to pan when you turn steaks. Drizzle steaks with soy sauce mixture. Garnish with green onions, if desired.