Place the weighted sandwich in the refrigerator for at least a couple of hours or overnight. Before serving, remove the weight, unwrap the compressed sandwich, and let it come to room temperature. Cut into serving-size wedges or, as an hors d’oeuvre cut in thin parallel slices, and again into short, bite-size lengths. 1 large sandwich makes 8 large wedges or 24-hors-d’oeuvre-size pieces.