Preheat oven to 400 degrees. Line a baking pan with foil and lightly spray foil with vegetable oil spray. Pour milk into a shallow bowl or pie pan. Combine cornflake crumbs, rosemary, and pepper in another shallow bowl/pie pan. Dip chicken pieces first into milk and then into crumb mixture. Allow to stand briefly so coating will adhere. Arrange chicken in prepared pan so pieces do not touch. Bake 45 minutes, or until done. Crumbs will form a crisp “skin”.