Cut a sheet of parchment paper large enough to fully cover the sandwich
Place the sandwich in the center of the parchment
Fold one side of the parchment over the sandwich
Fold the opposite side over to overlap the first fold
Tuck the top and bottom edges inward toward the sandwich
Fold the tucked ends under the sandwich to secure it
Press the paper gently to keep the wrap tight
Place the wrapped sandwich seam-side down if needed