Grilled Chicken with Rustic Mustard Cream

I'm finding treasures on the Cooking Light site right now. All chicken, all 5 ingredients or less...

Prep: 6 minutes; Cook: 12 minutes; Yield: 4 servings (serving size: 1 chicken breast half and 1 tablespoon mustard cream)
Ingredients:
1 tablespoon plus 1 teaspoon whole-grain Dijon mustard, divided
1 tablespoon olive oil
1 teaspoon chopped fresh rosemary
1/4 teaspoon salt
1/4 teaspoon black pepper
4 (6-ounce) skinless, boneless chicken breast halves
Cooking spray
3 tablespoons light mayonnaise
1 tablespoon water
Rosemary sprigs (optional)
Preparation:
1. Prepare grill.
2. Combine 1 teaspoon mustard, oil, and next 3 ingredients in a small bowl; brush evenly over chicken. Place chicken on grill rack coated with cooking spray; grill 6 minutes on each side or until done.
3. While chicken grills, combine 1 tablespoon mustard, mayonnaise, and 1 tablespoon water in a bowl. Serve mustard cream with grilled chicken. Garnish with rosemary sprigs, if desired.
Nutritional Information:
Calories:
262 (34% from fat)
Fat:
10g (sat 1.8g,mono 4g,poly 3g)
Protein:
39.6g
Carbohydrate:
1.7g
Fiber:
0.2g