Seafood and cheese sounds like an unorthodox combination; adding Mexican chocolate sounds like pure lunacy, but it works! I have adapted the recipe from one by Maria Edith Sánchez Sumano in an anthology of the best Oaxacan recipes collected by the Banco Rural (which has done a whole series on the cooking of all 31 Mexican states). Her recipe used the meat of a local spiny lobster, removed from the shell. I have had good results with rock lobster tails cooke