In a large skillet, warm over medium heat until hot. Add the ground beef, breaking it apart with a wooden spoon. Cook for about 5-7 minutes, or until the beef is browned and no longer pink. Drain any excess grease.

Add the minced garlic to the skillet with the browned beef and sauté for about 1-2 minutes until fragrant and golden.

In a small bowl, combine brown sugar, reduced-sodium soy sauce, sesame oil, ground ginger, crushed red pepper flakes, and pepper. Whisk until smooth.

Pour the sauce over the cooked beef, stirring well to coat. Let simmer for 2-3 minutes until flavors meld.

Serve the beef mixture over hot cooked rice, ensuring each portion gets sauce.

Garnish with sliced green onions and sesame seeds before serving.