4 servings (serving size: 1 cutlet)
1. Preheat oven to 425°.
2. Combine buttermilk and mustard in a shallow dish, stirring with a whisk. Add chicken to buttermilk mixture, turning to coat.
3. Heat a small skillet over medium-high heat. Add panko to pan; cook 3 minutes or until golden, stirring frequently. Combine panko, nuts, and next 4 ingredients (through pepper) in a shallow dish. Remove chicken from buttermilk mixture; discard buttermilk mixture. Dredge chicken in panko mixture.
4. Arrange a wire rack on a large baking sheet; coat rack with cooking spray. Arrange chicken on rack; coat chicken with cooking spray. Bake at 425° for 13 minutes or until chicken is done. Garnish with rosemary leaves, if desired.