Gather all ingredients.
Heat a large skillet over medium-high heat. Add beef and cook, 5 to 7 minutes. Drain excess grease.
Stir in garlic, ginger, and sesame oil and cook until fragrant, about 2 minutes.
Stir in soy sauce, brown sugar, and red pepper. Cook until beef absorbs some sauce, about 7 minutes.
Add ½ of chopped green onions.
garnish with sesame seeds and remaining green onions.
