In a bowl, combine chicken, onion, egg, breadcrumb mixture, flour, grated cheese, catsup and seasoning in an osterizer and process until well blended.
Divide mixture into eight portions and fill each ball with a slice of cheese and form into burger patties. Chill until firm.
Dredge patties in cornstarch and fry in hot oil until well done.
Happy cooking, Foodies!