Preheat oven to 425 degrees. Place butter in cast iron or oven safe skillet and put in oven to melt. (This can be done on stove top as well)
In a shallow dish whisk one egg and water together.
In another shallow dish combine panko crumbs, parmesan, salt, pepper, paprika, garlic powder, onion powder and oregano.
Dip the drumsticks first in the egg mixture and then in the panko, pressing to mixture into drumsticks to coat on all sides.
Place drumsticks into the skillet of melted butter. Drizzle the drumsticks with olive oil.
Place in oven and bake for 25 minutes, turn chicken and bake for 20 mote minutes.