
Slice the shrimp in half lengthwise and discard any veins. The process is to open it like a butterfly and not cutting all the way through.
Transfer to a large dish or bowl and cover with plastic. Refrigerate while we prepare the rest of the ingredients.
In a blender, add the chiles, cilantro, water & lime juice. Puree thoroughly.
Add the aguachile mixture to the shrimps. Add the red onion and cucumber at this point if you would like. Otherwise, you can just garnish it when serving.
Sprinkle some salt and pepper to taste then place in refrigerator for 10 to 20 minutes.
Serve right away topped with sliced avocado, cucumbers and red onion. Eat with tostadas, tortilla chips, or saltines.