Cook’s note: Pasteurized lump crab meat can be replaced by cooked shrimp in this recipe.
To prepare the pickled onions:
Thinly slice onion and place it in a shallow dish or bowl. Top with vinegar, salt, and sugar and let sit at room temperature for 10 to 30 minutes.
To prepare the Bloody Mary dressing:
Mix all the dressing ingredients together in a medium-sized bowl. This can also be done in a martini shaker and poured from it.
To assemble the “cocktail”:
Divide crab evenly among six martini glasses. Place several pickled onion slices on top of the crab meat. Pour 1/4 cup of the vinaigrette into each glass over the crab meat and garnish with a tablespoon (or more) of Grey Goose vodka. Top with 2 tablespoons katafi,if available.
Leftover vinaigrette and pickled onions can be regrigerated for up to two weeks.