Preheat the oven to 392 °F/200 °C.
Place the drumsticks in a bowl and thorougly mix them wih a tbsp of oil, salt, black pepper and chopped onion. The meat will taste best if you leave it to marinate for at least 30 minutes.
Transfer the drumsticks to a well-greased pan. Bake at 392 °F/200 °C for 20 minutes.
In the meantime, prepare the batter. Peel and grate the potatoes and mix them with the seasoning that consists of chopped onions, garlic, salt, black pepper and dried chives.
In a separate bowl, whisk two eggs, flour and milk. Mix it all together with the potato batter.
After 20 minutes (when the drumsticks are starting to get a nice brown color), remove them from the oven, Add the batter to the pan and gently, evenly distribute it around the drumsticks.
Bake at 392 °F/200 °C for another 45 minutes.
Right before the end of baking, top your kljukuša with sour cream mixed with a pinch of salt and powdered garlic. Bake for the last 5 minutes.
When baked, let kljukuša settle for a few minutes and serve while still hot and fresh. It pairs perfectly with a salad and/or yogurt. Enjoy :)