Bring all ingredients to a boil, except Aquavit. Strain. Add 2 tablespoons Skane Auavit. Place into a glass baking dish. Put into freezer. Take out when solid. Chop up so it looks like crystal.
To make skewers, start with a piece of cheese on the skewer and add 1 tail of crayfish, 1 piece of potato and then cheese. Repeat until skewer is full.
Recipe courtesy of Marcus Sameulsson, Aquavit Restaurant