Mustard Pecan Chicken with Maple Glaze

Name: Mustard Pecan Chicken with Maple Glaze
Ingredients: 3-4 lb. Chicken Breast, skinless, boneless; 4 Large Egg Whites w/ few pinches salt; 1/3 cup Pommery Mustard *; 2 ½ cups Fresh Bread Crumbs (i prefer french baguette types); 2 ½ cups Ground Pecans (not too fine and not too coarse); Kosher salt and freshly coarsely ground black pepper; 8- 12 ounces Unsalted Butter; approx. 1- 1 1/2 cups Grade B Maple Syrup**; Pommery Mustard is essential for this. I prefer the one in the crock with the red lid.; ** Grade B maple syrup usually has more flavor than Grade A