adapted from Roland Passot
Blend the spices in a spice grinder or mortar and pestle until fine, then mix with the salt and sugar. Toss in the lime and lemon zest and mix together—this is your cure.
Place a piece of parchment paper in an 8- by 12-inch glass or ceramic dish, leaving enough overhang to fold over the salmon, once it gets in there. Sprinkle a handful of the cure on the parchment.
Score skin side of the salmon with a sharp knife, 5 diagonal cuts, running the length of the filet, about 5mm deep then place the salmon skin side down in the prepared dish.
Pour the vodka over the fillet and pack the cure around the fillet, making sure to get some along the sides of the fish. Fold over the parchment overhang, cover the dish with plastic wrap, and refrigerate for 24–48 hours.
After curing, rinse the fillet under cold water to remove cure, pat dry with paper towels, and allow to air dry under refrigeration before covering with fresh parchment for storage. At serving time, trim away skin and slice salmon very thinly.