In a medium bowl, whisk together soy sauce, brown sugar, sesame oil, minced garlic, grated ginger, crushed red pepper flakes, and black pepper.

Heat a large skillet over medium-high heat. Add ground beef, breaking it apart as it cooks until browned, about 5-7 minutes.

Carefully drain excess fat from the skillet.

Return skillet to medium heat and pour the sauce over cooked beef, stirring to coat for 2-3 minutes.

Spoon beef mixture over bowls of cooked rice and garnish with green onions and sesame seeds.