Pre heat the oven to 400.
Pat the chicken dry and season with salt and pepper and put the chicken into a zip top bag. Mix all of the ingredients for the marinade in a bowl, taste and adjust if necessary and then pour the marinade over the chicken and close the bag. Let the chicken marinate in the refrigerator for at least 3 hours.
Prepare the pepper relish. Mix all of the ingredients in a bowl, taste and adjust as necessary and then cover with plastic wrap and refrigerate until ready to use.
Sear the chicken. Remove the chicken from the marinate but DO NOT throw the marinade away. Heat a cast iron pan over medium high heat and sear the chicken until a nice brown crust forms; about 2 minutes on each side.
Bake the chicken. Position a wire rack over a parchment paper lined sheet pan and lay the drumsticks on the rack. Bake for 45 minutes or until chicken reaches an internal temp of 165 and liquid runs clear when pierced.
While the chicken is baking, make the glaze. Pour the marinade into a small non stick pan. With a slotted spoon, remove the onions from the marinade and discard. Bring the marinade to a boil and then simmer until it's reached a thick consistency; about 5 minutes.
Remove the chicken from the oven and brush the glaze over each piece. Serve with the pepper relish.
Enjoy!