INGREDIENTS
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1 large end piece of beef tenderloin (about 3 pounds), tied and trimmed
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Extra-virgin olive oil
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Kosher salt and freshly ground black pepper
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Assorted fresh herbs (such as thyme, sage, and rosemary)
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Hydroponic watercress (optional)
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1/4 cup champagne vinegar
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1/4 cup dry white wine
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2 shallots, minced
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3 tablespoons fresh tarragon leaves
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3 egg yolks
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1 stick unsalted butter, melted
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Kosher salt and freshly ground black pepper to taste