Rinse the chicken drumettes and pat them dry with paper towels. Combine the rest of the ingredients, except the sesame seeds, in a blender and purée, coating them well. Seal the bag. Marinate the drumettes in the refrigerator for at least 2 hours, turning the bag over periodically.
Preset the oven to broil. Arrange the drumettes on a broiler pan with a rack and sprinkle with half of the sesame seeds. Discard the marinade. Place the pan under the broiler for 5 to 6 minutes. Remove and turn over the drumettes. Sprinkle them with the remaining sesame seeds and broil for 5 to 6 minutes more.