In a shallow plate, combine flour, paprika, salt and pepper. Beat the egg in another shallow plate. Place the panko breadcrumbs in a third shallow plate.
Cut the chicken breast into small pieces. Dredge the chicken in flour, dip into eggs, then dredge in panko, pressing to coat.
Place the coated chicken bites into hot oil and deep-fry until golden and crisp. Remove from oil and drain on kitchen paper.