Combine the remaining ingredients -- the soy sauce, beef broth brown sugar, red pepper flakes, pepper, and hoisin sauce in a small dish and pour into ground beef mixture.
- 1/2 CUPlow sodium soy sauce
- 1/2 CUPbeef broth
- 1/4 CUPbrown sugar
- 6 TBSPhoisin sauce
- 1/2 TSPred pepper flakes
- 1/2 TSPblack pepper