Partially thaw the bag of chicken. It doesn't have to be completely thawed.
Pour the jar of salad dressing into the bag of chicken. Add the chopped basil.
Seal and roll the bag until all the chicken is covered with dressing.
Place the bag in a 9 x 13 baking dish.
Refrigerate 4 to 6 hours.
Remove the baking pan from the refrigerator. Empty the contents of the bag into the pan.
Cover loosely with plastic wrap.
Microwave for 5 minutes.
Remove from microwave and turn chicken, making sure to move the pieces around and redistribute the dressing.
Microwave for 5 minutes more.
Place chicken on preheated grill. Add salt and pepper. Cook on medium heat for 6 to 7 minutes per side. Check to see if it’s done before removing from grill. Chicken should be white and the juices should be clear. (Cooking time will vary depending on the heat of your grill.)