INGREDIENTS
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For mushroom duxelles:
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1 pound cremini mushrooms, coarsely chopped
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1 tablespoon extra-virgin olive oil
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1/2 teaspoon salt
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1/4 teaspoon black pepper
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For herb crepe:
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1/2 cup all-purpose flour
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2 eggs
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1 teaspoon sugar
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1/2 teaspoon salt
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2 tablespoons chives, minced
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1/2 cup whole milk
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1/4 cup water
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4 tablespoons butter, melted, plus more if needed for pans
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For beef Wellington:
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2 pounds filet mignon
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Salt and black pepper, to taste
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2 tablespoons olive oil
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1/4 cup whole-grain Dijon mustard
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1/2 pound prosciutto di Parma
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1 sheet puff pastry, thawed
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1 egg yolk
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1 tablespoon whole milk