Panko Crusted Chicken with a Maple-Mustard Pan Sauce

This was amazing.  Josh talked about this for several days after I made it and he was very happy with how it turned out.  It's a recipe that I got from the October issue of Bon Appetit Magazine.  I will definitely be making more recipes from Bon Appetit from now on.  I'm really going to utilize that subscription!

Ingredients
2 8-ounce skinless boneless chicken breast halves, cut crosswise in half
1 large egg
1 tablespoon finely chopped fresh Italian parsley
2 teaspoons plus 2 tablespoons Dijon mustard
1 cup panko (Japanese breadcrumbs)
2 tablespoons olive oil
1 cup low-salt chicken broth
3 tablespoons pure maple syrup
2 tablespoons plus 1 teaspoon coarse-grained mustard
1 tablespoon chilled unsalted butter

Preparation

Using meat mallet or rolling pin, pound chicken in re-sealable plastic bag to 1/3- to 1/2-inch thickness. Whisk egg, parsley, and 2 teaspoons Dijon mustard in large bowl. Place chicken in egg mixture; turn to coat. Sprinkle chicken with salt and pepper. Dip each chicken piece in panko; turn to coat.

Heat oil in large nonstick skillet over medium-high heat. Add chicken; cook until brown and cooked through, about 4 minutes per side.

Meanwhile, whisk broth, syrup, coarse-grained mustard, and remaining 2 tablespoons Dijon mustard in glass measuring cup.

Transfer chicken to plates. Add broth mixture to skillet; boil until reduced to 3/4 cup, stirring occasionally, about 4 minutes. Add butter; whisk until melted. Spoon sauce alongside chicken.