1. Zest rind of one lemon. 2. Juice the lemons and marinate the chicken in the lemon juice and half of the chipotle sauce, for 1-2 hours. 3. Remove chicken from marinade; discard the marinade. 4. Make a glaze from remaining chipotle pepper sauce, Splenda, honey mustard and lemon zest. 5. Grill over medium high heat, about 8 minutes per side, brushing with glaze towards the end of cooking.