In a bowl, mix flour, salt, sugar, pepper, and seasoning powder.

Slightly beat the egg in a separate bowl, sprinkle some salt, pepper, and seasoning powder.

In the third bowl, pour a cup of panko bread crumbs.

Slice the onion into rings, from one end to the other.

Dip the rings to flour, egg, and panko crumbs. Repeat the process until all the onions are coated.

Deep fry in hot oil until golden brown.

Drain the cooked food on paper towels.