1teaspoonkosher saltdivided (from the 2 tablespoons plus 1 teaspoon total)
1/2teaspoonbaking soda
2quartswaterdivided (1.9 L)
2cupsdry white wine480 ml
2ribscelerydiced
1mediumyellow oniondiced
1fennel bulbdiced (optional)
3medium clovesgarlicsmashed
1(2-inch) knob fresh gingerpeeled and thinly sliced
2sprigsfresh tarragon(optional)
2sprigsflat-leaf parsley
Fresh juice of 1 lemon
For the Cocktail Sauce
1/2cupketchup120 ml
2tablespoonsstore-bought or homemade preserved horseradishplus more to taste (30 g)
1tablespoonfresh juice from 1 lemon15 ml
1/2teaspoonground coriander seed(optional)
1/4teaspoongranulated garlic(optional)
Kosher saltto taste
freshly ground black pepperto taste
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Instructions
Brine the shrimp for better texture
In a large bowl, toss shrimp with 1 teaspoon kosher salt and baking soda until evenly coated.
Transfer to refrigerator until thoroughly chilled, about 30 minutes (shrimp should look slightly translucent and feel a touch tacky).
Build the shell-infused court bouillon
Meanwhile, in a medium pot, combine 1 quart water with white wine, celery, onion, fennel, garlic, ginger, tarragon, parsley, lemon juice, and remaining 2 tablespoons salt.
Add reserved shrimp shells, then bring to a simmer over medium heat (gentle bubbles and fragrant steam).
Lower heat and gently simmer for 20 minutes.
Strain out and discard solids and return broth to pot, then add remaining 1 quart cold water (to quickly lower the temperature of the broth).
Poach precisely, then chill fast
Add shrimp to pot with broth and set over medium-high heat.
Cook, stirring occasionally, until temperature reaches 150°F on an instant-read thermometer and shrimp are just cooked through; adjust heat so temperature does not go much over 150°F.
Watch for shrimp that curl into a “C” shape; a tight “O” usually means overcooked.
Using a slotted spoon, transfer shrimp to a rimmed baking sheet, spreading them in an even layer.
Transfer to refrigerator until shrimp are cool, then transfer to an airtight container and continue to refrigerate until thoroughly chilled, at least 30 minutes.
Mix the cocktail sauce and serve
For the Cocktail Sauce: In a medium bowl, whisk together ketchup, horseradish, lemon juice, and ground coriander and garlic if using. Season with salt and pepper.
Spoon cocktail sauce into a small bowl and serve with the chilled shrimp alongside.
Notes
Keep tails on for easy dipping, and stop cooking at 150°F for the best “snap-crisp” texture.Nutrition information is estimated based on common ingredients and serving sizes and may vary.