1 tablespoon hot sauce (such as Valentina or Tabasco)
2 teaspoons celery salt
¼ cup sherry vinegar
¾ cup horseradish
½ teaspoon sea salt
2 teaspoons freshly ground black pepper
½ cup clam juice
¼ cup fresh lime juice
¼ cup fresh lemon juice
1 head-on prawn per cocktail
Olive oil
Pinch kosher salt
Ice
5 ounces Bloody Mary mix
2 ounces vodka
1 raw oyster, shucked
1 grilled prawn
Directions
Make the Bloody Mary mix: In a food processor, add the onion and water, and pulse until smooth.
In a large pitcher, combine the onion purée and the remaining ingredients, and stir. Refrigerate for at least 2 hours or overnight.
Make the grilled prawn(s): Place a grill pan over medium-high heat. Drizzle the prawn(s) with olive oil and sprinkle with salt. Grill, flipping occasionally, until bright pink and the meat is cooked through, 8 to 10 minutes.
Make the cocktail: Fill a tall glass with ice. Add the Bloody Mary mix and vodka, and tumble once. Drop in the oyster and garnish the edge of the glass with the grilled prawn. Then serve.