Chef John's New Orleans-Style Barbequed Shrimp
Ingredients:
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1 ½ pounds colossal shrimp, EZ-peel type (deveined and shells split down the back)
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1 ½ tablespoons vegetable oil
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1 tablespoon freshly ground black pepper, or to taste
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¼ teaspoon smoked paprika
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⅛ teaspoon cayenne pepper
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⅛ teaspoon seafood seasoning (such as Old Bay®)
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1 tablespoon butter
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2 cups chicken stock
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lemon, juiced
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2 tablespoons Worcestershire sauce, or more to taste
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2 dashes hot sauce, or to taste
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3 tablespoons cold butter, cut into chunks
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6 cloves garlic, minced
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1 tablespoon minced fresh rosemary
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1 sprig fresh rosemary for garnish