In a small bowl combine the mayonnaise, mustard, syrup, and vinegar. Mix well.
¼ cup Mayonnaise, ½ cup Dijon Mustard, ½ cup Maple Syrup, 3 tablespoon Red Wine Vinegar
Spread a thin layer of this mixture into the bottom of a 9x13" baking dish. Next place the chicken breasts evenly in the dish and season liberally with salt and pepper.
4 Boneless Skinless Chicken Breasts, Salt and Pepper
Pour the remaining mustard mixture over the chicken breasts and spread evenly so that all of the chicken is covered.
Top with the chopped rosemary and bake uncovered for 45-50 minutes or until a meat thermometer reads 165 degrees F when inserted into the thickest part of the chicken breast.
1-2 tablespoon Fresh Rosemary
Allow to cool for 5-10 minutes before slicing chicken.
Notes
Using sugar free maple syrup makes this a zero net carb recipe!