Slice the beef into 2 cm wide strips and place in a bowl.

Add minced garlic, sugar, and ground pepper to the beef. Mix well.

Add soy sauce, sesame oil, oyster sauce, and vinegar to the beef. Mix thoroughly.

Massage the beef with the marinade until tender.

Spread the marinated beef thinly on parchment paper to match the size of your pan.

Freeze extra marinated beef in a ziplock bag for future use.

Heat 1 tbsp cooking oil in a pan over high heat, then reduce to medium heat before adding the beef.

Place the beef on the pan with parchment paper and press gently with a spatula.

Remove the parchment paper once the beef starts cooking. Cook for 2 minutes on each side.

Fill any gaps with remaining beef mixture and press down.

Slice green onions thinly and remove the sticky inner part.

Arrange spring greens on a plate and place the cooked beef on top.

Sprinkle sesame seeds over the beef.

Garnish with sliced green onions and mini bell peppers.