The endothermic gas reaction takes place in two steps or stages. In the first stage, some of the methane. burns with air creating an exothermic (heat generating) reaction. In the second stage, the surplus methane. reacts with the carbon dioxide and water vapor produced in the first stage. This second stage is endothermic. (heat absorbing).
Pat the chicken drumsticks dry with clean paper towels. Cover them with plastic wrap or aluminum foil to warm them up to room temperature for 30 minutes. Preheat a gas or charcoal grill to 400 degrees F. If you are using a charcoal grill without a temperature gauge, this will take about 20 minutes.
For the marinade, put all of the marinade ingredients into a large bowl and stir to combine. Add the chicken and allow to marinate while you preheat the oven to 200C/180C Fan/Gas 6. Put the chicken drumsticks on a roasting tray and roast for 20-30 minutes, or until the skin is golden and the chicken is cooked through.(To check, pierce the drumstick at its thickest part, next to the bone.The juices should run clear.).ut the chicken drumsticks on a roasting tray and roast for 20-30 minutes, or until the skin is golden and the chicken is cooked through. (To check, pierce the drumstick at its thickest part, next to the bone. The juices should run clear.).