Instructions
To Freeze:
In a small bowl, whisk soy sauce, sesame oil, brown sugar, green onions, garlic, red pepper flakes and ginger until well combined.
Place beef into a large plastic or reusable freezer bag and pour soy mixture over the meat. Seal, label and freeze for up to 3 months.
Slow Cooker
From frozen - 4 to 6 hours on High. Shred meat with 2 forks when tender.
Instant Pot
From frozen - 55 minutes on High pressure + 10 minutes natural release. Shred meat with 2 forks.