I got this recipe from my latest edition of Cooking Light and it is a delicious keeper! Makes weeknight chicken taste company-worthy and is done in 1/2 hour. The magazine suggests serving it with a salad topped with a toasted garlic vinaigrette.
Combine buttermilk and mustard in a shallow dish, stirring with a whisk. Add chicken to buttermilk mixture, turning to coat.
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.
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.
Note: If you don't have chicken cutlets, pound your boneless-skinless chicken breasts between two sheets of wax paper to make them uniformly about 1/2-inch thick.