- Heat a medium cast-iron pan over high heat and grease with sesame oil. Heat pan for 2-3 minutes, until very hot.
- Blot steak dry with paper towel. Add steak to pan and sear for 5-6 minutes or until beef is lightly browned, tossing occasionally with tongs.
- Reduce heat to low. Stir in sukiyaki sauce and green onion. Continue to cook 2 minutes longer.
- Serve steak hot over rice and garnish with sesame seeds.