INGREDIENTS
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8 Tbs. (1 stick) (4 oz./125 g) unsalted butter, at room temperature
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2 tsp. minced fresh rosemary
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2 tsp. minced fresh thyme
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2 tsp. minced fresh sage
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2 tsp. minced fresh flat-leaf parsley
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2 garlic cloves
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Kosher salt and freshly ground pepper
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1 beef tenderloin, about 4 lb. (2 kg)
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1/2 cup (4 oz./125 g) crème fraîche
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3 Tbs. prepared horseradish, plus more, to taste