To prepare chicken, combine buttermilk and chicken. Marinate in refrigerator 30 minutes; drain.
Preheat oven to 375°.
Place cornflakes, paprika, sugar, and salt in a food processor; process until cornflakes are finely chopped. Combine chicken and cornflake mixture, tossing well to coat. Place the chicken on a baking sheet coated with cooking spray. Bake at 375° for 15 minutes or until done.
To prepare sauce, combine mustard, honey, and ginger. Serve with chicken.