In a separate bowl, mix sour cream, salt, black pepper, sweet paprika, curry, thyme, garlic and chili pepper.
Mix well.
Pour this marinade over the prepared chicken drumsticks.
Leave in the refrigerator for 30 minutes.
Grease the baking bowl with sunflower oil.
Lay out the chicken drumsticks.
Add the onion, cut into half rings, on top.
Bake in a preheated oven at 170° for 45 minutes.