A simple marinade makes these juicy chicken breasts extra yummy
In a bowl combine the pure maple syrup, dijon mustard, soy sauce, and fresh rosemary, Whisk until evenly combined.
Place the chicken in a gallon size plastic bag. Add 4 Tbsps of the maple mustard sauce, kosher salt and pepper to taste, and crushed red pepper flakes if using. Massage the bag until evenly mixed. Marinate at least 1 hour.
Grill the chicken over medium to medium high heat for 5-8 minutes per side. Brush with more of the maple mustard sauce during the last few minutes of grilling.
Serve with the remaining maple mustard sauce for dipping.