I had my hands in this recipe. This is the one my mom and I made! Very good and very simple to make. Again, squeezing the lemons and limes is the most difficult part. We served these on endive leaves, which was a very pretty presentation, but it would also look lovely served in a martini glass. A jalapeno pepper may be substituted for the serrano pepper if desired. And remember, the lemon and lime juice are what "cook" the shrimp in this recipe, so the smaller the pieces of shrimp the quicker it will "cook". The servings are an estimate, we doubled the recipe in class. It does make quite a bit though.