Wipe the drumstick dry with paper towel, slice on both sides of drumsticks to make it cooks easier, do the same at thicker parts.
Place the drumstick on a plate, add seasoning to marinade chicken, massage it to make sure it is well coated in the marinade. Rub the seasoning on the sliced area as well. Refrigerate it for at least 2 hours. (Put on the plastic wrap helps to prevent over dry).
Peel and cut the onion as matchsticks size, zest ½ piece of lemon juice, and cut another ½ piece of lemon into round slice. Slice on cherry tomatoes for easy penetration later. Keep the basil leaf only.
Clean the oozing blood from chicken drumstick if there is any.
Place the drumstick into the inner pot, add in onion slices, basil leaf, lemon juice and olive oi, mix all the ingredient well and spread the vegetables at the bottom of pot.
Peel and cut off the stalk of garlic, put it with cherry tomatoes and lemon slices, close the lid, set the temperature to 160°C for 30minutes, and increase the temperature to 200°C for 20minutes and bake it until brown.