If you don't have a Panini Grill
Heat skillet on medium heat. Cook sandwich 3 min. on each side or until cheese is melted and sandwich is golden brown on both sides, gently pressing down top of sandwich with spatula to flatten slightly as it cooks.
Sandwiches can be assembled ahead of time. (Do not spread with mayo mixture.) Wrap each sandwich individually and refrigerate up to 4 hours. When ready to serve, spread with dressing mixture and grill as directed.
For best results, do not prepare with MIRACLE WHIP Light Dressing or MIRACLE WHIP FREE Dressing.