In a large bowl, add pesto and Italian dressing. Whisk together. Add chicken, cover with marinade, and refrigerate for at least 30 minutes [or up to 8 hours].
Preheat your grill to medium-high heat. Let the chicken sit at room temperature for 15 minutes before grilling. Place chicken on the grill and cook 6 minutes each side, or until juices run clear.
Let grilled chicken rest 5 minutes, covered, before slicing and serving.
Recipe by Mom to Mom Nutrition at https://momtomomnutrition.com/food-and-recipes/pesto-grilled-chicken/