Mince the onion and place it in a microwave-safe container. Cover loosely with plastic wrap and microwave at 600W for 1 minute. Let cool. Mince the green onion.

In a bowl, mix the minced green onion with the Negi Salt Sauce ingredients (★).

In a separate bowl, combine ground meat, minced onion, and Meat Mixture ingredients (☆). Mix until sticky and divide into two portions. Shape each into an oval patty.

Heat sesame oil in a frying pan over medium heat. Place the patties in the pan and cook until browned. Flip, cover with a lid, and cook on low heat for 7–8 minutes until fully cooked.