Prepare all your ingredients. Mince the garlic, grate the ginger, and have the rest of the ingredients measured and ready.
In a skillet over medium heat, cook the ground beef until browned, breaking it up as it cooks.
Add garlic and ginger, stirring until fragrant. Mix in the soy sauce, sesame oil, brown sugar, and red pepper flakes. Let simmer until thickened slightly.
Serve the beef over steamed rice, topped with green onions and sesame seeds.
Notes
Store leftover beef and rice separately for easier reheating. Use within three days or freeze for longer storage.