In a gallon zipper bag place chicken along with soy sauce, brown sugar, garlic, oil, ginger, chili paste, and crushed red pepper.
Marinade for 30 minutes to overnight.
Preheat oven to 375 or grill to high.
Bake chicken on a foil-lined baking sheet at 375 for 30-40 minutes or until cooked to 170° and charred on the edges or grill the chicken on the grill until the internal temperature is 170°
Save the marinade and heat it in a saucepan by mixing cornstarch into the sauce before you turn on the heat, so it's smooth, then heat it up until it's thick.
Brush sauce over cooked chicken.
Top chicken with sliced green onion and sesame seeds.