Mexican Coctel de Camarones

https://www.seriouseats.com/mexican-shrimp-cocktail-coctel-de-camarones-recipe

INGREDIENTS

• 1 ¾ pounds shrimp, shelled and deveined (see notes)
• 2 tablespoons plus 1 teaspoon kosher salt, divided, plus more to taste
• ½ teaspoon baking soda
• 6 tablespoons fresh juice from about 8 limes, divided, plus more as needed
• 1 cup diced white onion (about ½ large onion)
• ¾ cup tomato purée
• ½ cup ketchup
• 3 tablespoons chopped cilantro leaves and tender stems
• 2 tablespoons fresh juice from 1 orange
• 1 jalapeño or serrano pepper, stemmed, seeded, and finely diced
• Saltines, for serving
• Diced avocado, for garnish
• Mexican-style hot sauce, such as Tapatío, for serving

DIRECTIONS

1. In a large bowl, toss shrimp with 1 teaspoon kosher salt and baking soda until evenly coated. Transfer to refrigerator for 15 minutes.

2. Meanwhile, in a medium bowl, stir together 4 tablespoons lime juice with onion, tomato purée, ketchup, cilantro, orange juice, and jalapeño.

3. In a medium pot, combine 2 quarts cold water with remaining 2 tablespoons lime juice and 2 tablespoons salt. Add shrimp, set over medium-high heat, and cook, stirring occasionally, until temperature reaches 170°F (77°C) on an instant-read thermometer and shrimp are just cooked through; adjust heat to make sure temperature does not go over 170°F.

4. Drain shrimp carefully, rinse under cold running water, then drain well. Cut shrimp into 1/2-inch pieces. Add shrimp to bowl with sauce and toss to combine. Taste, then add more lime juice if desired. Top with avocado and serve immediately with saltines and hot sauce.

NOTES

• You can skip the deveining if the shrimp don't have dark veins. I've also found that you can often remove the veins with tweezers from the head end of the shrimp without having to slice them down the back, which is the most common method for deveining (though that method works well, too).

• Exactly how much lime juice you need will depend in part on the specific brands of tomato purée and ketchup you use; adjust accordingly to get the flavor balance that tastes right to you.