Slice the shrimp from head to tail down the middle or cut horizontally into small pieces.
To a medium bowl, add the raw shrimp and 1 cup of fresh lime juice. Cover the bowl with plastic wrap and let it rest 25 minutes. Stir in diced onions and let it rest another 5 minutes.
Add the jalapeño, tomato and cilantro to the bowl. Toss to mix thoroughly. Season with salt and pepper. Serve immediately or cover and chill before serving with tortilla chips.
For Cooked Shrimp
In large soup pot, bring 6 cups of water to a rolling boil over medium high heat. Add 2 tablespoons of salt, juice from1 lime and the raw shrimp. Cook 1 minute then remove immediately, drain through a colander and run cold water over shrimp to stop the cooking. Drain and set aside to cool.
To a medium bowl, add the onions and 1 cup of fresh lime juice and let rest 5 minutes.
Add the shrimp, jalapeño, tomato and cilantro to the bowl. Toss to mix thoroughly. Season with salt and pepper. Serve immediately or cover and chill before serving with tortilla chips.
Notes
Optionally, add corn and diced avocado to the mixture just before serving. Nutritional information shown does not include optional ingredients or chips.