INGREDIENTS
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1/3 pound trimmed beef tenderloin, frozen for 1 hour, then cut crosswise into 8 slices
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8 teaspoons freshly grated parmigiano-reggiano or grana padano cheese
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8 thin slices black truffle or 1 1/2 teaspoons black truffle paste
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8 long fresh chives
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6 cups homemade meat broth