In a small bowl, whisk together the soy sauce (¼ cup), brown sugar (¼ cup), garlic (2 tsp), ginger paste (½ tsp), red pepper flakes (½ tsp), and sesame seeds (½ tsp). Set aside.
In a large saucepan, heat the olive oil (1 Tbsp) on medium heat. Add the ground beef (1 lb), and cook it until no longer pink, breaking it up into small pieces as you go. Don't overcook it. Drain the excess liquid.
Add the soy sauce mixture to the ground beef, and cook for another 1-2 minutes while stirring. Remove from heat.