Heat panini grill sprayed with cooking spray.
Spread tortilla with mayonnaise.
Layer remaining ingredients on half of tortilla; fold tortilla in half.
Grill 2 to 3 minutes or until golden brown.
Variations: No Panini Grill? Use a skillet. Heat skillet on medium heat. Cook sandwich 3 minutes 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.