Cook the Ground Beef: Heat a large skillet over medium heat. Add ground beef and cook, breaking it apart, until browned. Drain excess grease if needed.
Add Garlic: Once the beef is halfway cooked, add minced garlic and stir for about 1 minute until fragrant.
Make the Sauce: In a small bowl, whisk together soy sauce, brown sugar, sesame oil, ground ginger, red pepper flakes, and black pepper.
Simmer and Absorb Flavors: Pour the sauce over the beef and stir well. Let it simmer for 3–5 minutes until the flavors are absorbed.
Serve: Spoon the beef mixture over cooked rice. Garnish with green onions and sesame seeds.