INGREDIENTS
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1 cup (packed) fresh herb leaves (such as flat-leaf parsley, chives, and tarragon)
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1/2 small garlic clove
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1/2 cup (1 stick) unsalted butter, room temperature
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1/4 teaspoon finely grated lemon zest
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1 teaspoon fresh lemon juice
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Kosher salt, freshly ground pepper