Add onion powder and garlic to the feta cheese and smash it using the back of your spoon. Fill the olive pits with this seasoned cheese mixture.
In another bowl, whisk the egg and set it aside. Set up a dredging station with the whisked egg, breadcrumbs (seasoned with mixed herbs) and flour in separate bowls.
Coat each olive first in the flour, then in the whisked egg mixture and finally in the seasoned breadcrumbs.
Deep fry the stuffed olives at medium heat until golden brown and crispy.
Notes
Be mindful about the amount of salt you're using. Both feta cheese and olives are already really salty on their own.
You can also try using other kinds of cheese for the stuffing. Stay away from a melty cheese like Mozzarella though- it can really start to ooze from the sides while frying.
You can also use seasoned breadcrumbs like my crispy Italian breadcrumbs to coat the olives for some extra flavor.
Be gently while frying the olives- the coating may come off and the olives can fall apart in the oil.
Make sure the olives are completely dry before you begin coating them. The coating will stick to them much better!
You can also add chopped peppers to the feta mixture to lend it a spicy, bold flavor. I love chopping up some chili from my Italian preserved chilies in oil and adding them in.