INGREDIENTS
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1 pound medium asparagus
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1 tablespoon extra-virgin olive oil
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1/4 teaspoon kosher salt
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Freshly ground black pepper
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1 large egg yolk
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1 1/2 teaspoons freshly squeezed lemon juice
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Pinch cayenne pepper
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4 tablespoons unsalted butter (1/2 stick)
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1/2 teaspoon kosher salt