Preheat oven to 180-degree Celsius. Line a baking tray with parchment paper and keep it aside.
Heat a non-stick pan over medium heat. Add sesame oil and whisk in the cornflour. Cook for half a minute.
Add garlic and ginger paste. Cook for a minute.
Combine soy sauce, chilli sauce, honey and vinegar in a bowl. Pour this sauce mixture into the pan and whisk. Bring it to a simmer and cook till the sauce starts to thicken. Turn the heat off and keep it aside.
In a medium-sized bowl, add the chicken drumsticks. Pour the warm sauce and sesame seeds. Give it a mix.
Place the chicken drumsticks on the baking tray. Bake for 40 to 45 minutes.
Garnish with sesame seeds and serve.