In Large Bowl, combine Italian Dressing with Garlic Powder,Onion Powder,and Ground Cumin.
Mix well so that all ingredients are combined and distributed through out the liquid.
Make sure the chicken breasts are cut down to portion sizes.
Place in large bowl and seal with lid.
Shake to cover the chicken breast with the marinade.
Refrigerate at least 6 hours or up to overnight.
When ready to cook,Preheat grill to 425* (We cooked these on our Rec Tec Grill - link at bottom of post)
Remove Chicken from marinade and cook on grill for 15 minutes each side.
Remove and serve.