- Assemble sandwiches starting with one slice of bread, then 1 slice of ham, a slice of cheese and then a slice of turkey; place one slice of bread and repeat with ham, cheese and turkey, top with a slice of bread. Cut into quarters and secure with toothpicks. Cover sandwiches with plastic wrap and refrigerate overnight.
- Heat oil in deep fryer to 365 degrees.
- Dust each quarter sandwich with flour until all sides are coated; dip into beaten egg and toss into panko and cover completely.
- Carefully lower sandwich quarters one at a time into deep hot oil; fry until golden brown on all sides. Drain; remove toothpicks before serving.