Cut the lemongrass into small rings, then use a mortar and pestle to pound them lightly. This will help release the aromas and wonderful fragrance of the lemongrass. If you don't have a mortar and pestle, you can use the back of your knife to pound them.
Rinse the chicken and pat dry with paper towels. Add the lemongrass and garlic to the chicken and gently rub them on the chicken. Add all the Marinade ingredients to the chicken, stir to mix well, so the chicken drumsticks are nicely marinated with all the ingredients. Set aside to marinate for at least 30 minutes, or best for a few hours.
Pre-heat the oven to 375°F (190°C). Line the chicken on a tray lined with baking sheet and bake for 30-40 minutes in the middle of the oven, or until the surface turn golden brown, slightly charred, and the inside is cooked through. Transfer the chicken out, keep the tasty juices that seep out from the chicken, and serve immediately.
Notes
If there are burnt lemongrass and garlic on the chicken, scrape them off before eating.