Known as salame dolce (sweet salami), thin slices of this rich treat are great with an after-dinner espresso. Crushed vanilla wafers give it the mottled look of salami. Because the wafers are coarsely crushed, the pieces will vary greatly in size. Since the mixture is uncooked, use a pasteurized egg yolk (look for cartons of pasteurized egg yolks or pasteurized in-shell eggs).
Place sugar and egg yolk in a medium bowl; beat with a mixer at high speed for 3 minutes or until thick and pale. Beat in honey and butter. Add cocoa, 1/2 cup at a time, beating well after each addition. Stir in wine, water, orange rind, if desired, and wafers.
Spoon mixture onto a sheet of wax paper using a rubber spatula (mixture will be stiff). Using moist hands, shape mixture into a 6-inch log. Wrap log tightly with plastic wrap; chill at least 1 hour. Cut log into 1/2-inch-thick slices.