Combine mustard, maple syrup, and vinegar in a small bowl, stirring well; set aside.
Coat chicken lightly with cooking spray; sprinkle with pepper and salt.
Coat grill rack with cooking spray; place on grill over medium-hot coals (350-400 degrees).
Place chicken on rack; grill, uncovered, 15 minutes, basting often with mustard mixture.
Turn chicken, and grill 15 additional minutes or until meat thermometer inserted into thickest part of chicken registers 180 degrees, basting often with mustard mixture.
“Very Tasty! I just added some minced garlic to the sauce. Very nice”
“I really liked this.It was easy and different from the same old chicken.”
“I wanted something fast and easy, and not too sweet. This recipe looked good. Let me tell you, it is wonderful! The dijon mustard gives it a little zing and the maple gives it a little sweetness, but not overly sweet. When it’s grilled, it has a lovely golden coating. Even DH (who doesn’t like to rate recipes) gave a5 ‘M’ Mmmmm! We will be making this often during grilling season. Thanks for a great recipe!”