The following recipe was used for my Steam Buns cooking class. You can read about my class and get other links to recipes HERE.

2 bunches green onion, cut in 1 inch pieces
1 lb lean beef, sliced thin
salt & pepper to taste
1 tablespoon garlic powder
1 tablespoon onion powder
2 tablespoons cornstarch
1 onion, diced
3-4 cloves garlic, minced
1/4 cup oyster sauce
1/4 cup soy sauce

Season sliced beef with salt, pepper, garlic powder and onion powder.
Sprinkle cornstarch over beef and toss to coat. Set aside.
In hot pan saute garlic and onion in cooking oil until softened.
Add meat and brown.
Add oyster sauce and soy sauce; stir to coat.
Add green onions and toss.
Allow to cool before using as filling.