Add Chicken and Italian Dressing to Freezer Ziploc Bag.
Place in the refrigerator to marinate, turning and flipping every few hours if desired.
When ready for dinner {after several hours of marinating, or up to a day later}, remove the chicken from the bag, toss the marinade out, and get ready to grill!
Grill your pre-marinated chicken on the grill outside {8 minutes on each side at 400 degrees}, or on a grill pan inside.
To flatten your chicken breast to an even thickness, simply place it between two large pieces of plastic wrap. Then using the flat side of a meat mallet or tenderizer, gently pound your chicken breast, starting in the middle.