In a small bowl, whisk together: brown sugar, soy sauce, sesame oil and red pepper flakes, set aside.
Heat vegetable oil in a large skillet over medium high heat.
Add garlic and cook, stirring constantly for about 30 seconds to 1 minute, until fragrant.
Add fresh minced ginger and cook for another minute, stirring constantly.
Add ground chicken and cook until browned, about 3-5 minutes. Break apart and crumble the meat as it cooks.
Cut the green part of the green onions into 2 inch pieces.
Add the soy sauce mixture and green onions into the meat and stir until well combined, allowing to simmer until heated through, about 2 minutes.
Serve immediately over rice, garnished with sesame seeds.
