1. **Prepare the Shrimp:**
Start by cooking the shrimp if it’s not already cooked. Simply boil the shrimp for about 2-3 minutes or until they turn pink. Drain and allow to cool. Once cooled, chop the shrimp into bite-sized pieces, or leave them whole if preferred.

2. **Mix the Vegetables:**
In a large bowl, combine the diced cucumber, tomatoes, red onion, jalapeño (if using), and cilantro. Stir well to ensure everything is evenly mixed.

3. **Prepare the Sauce:**
In a separate bowl, mix the tomato juice, ketchup, lime juice, and hot sauce (if desired). Adjust seasoning with salt and pepper. The sauce should be tangy and slightly sweet, with a hint of spice.

4. **Combine Shrimp and Sauce:**
Add the chopped shrimp to the vegetable mixture and then pour the sauce over it. Stir until everything is well-coated in the flavorful sauce.

5. **Chill:**
Cover the mixture and refrigerate for at least 30 minutes to allow the flavors to meld together. This step is key to achieving that authentic Mexican shrimp cocktail taste!

6. **Serve:**
When ready to serve, gently fold in the diced avocado. Spoon the shrimp cocktail into individual serving glasses or bowls and serve with tortilla chips or saltine crackers on the side.

#### Tips:
– **Customization:** Feel free to adjust the heat by adding more or less jalapeño and hot sauce. You can also substitute the shrimp with other seafood like cooked crab or octopus for a twist.
– **Make Ahead:** This dish is great for making ahead of time. Just wait to add the avocado until right before serving to keep it from browning.
– **Presentation:** For a fun and festive touch, serve the shrimp cocktail in margarita glasses or small mason jars.

This Mexican Shrimp Cocktail is light, refreshing, and packed with bold flavors. It’s perfect for any occasion, from a casual summer BBQ to a fancy dinner party. Enjoy!

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Feel free to customize this recipe to your taste or share it with your readers for a delicious and easy way to bring Mexican flavors to their kitchens!