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Preheat the oven to 350F
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Line a large baking tray with parchment paper.
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Pour coffee beans into a freezer bag and crush with a heavy-bottomed pan until coarsely ground.
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Mix the crushed coffee beans with the salt and thyme.
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Massage the egg whites into the coffee salt until evenly distributed.
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Form a quarter of the mixture into a rectangle slightly larger than the piece of meat on the prepared baking tray.
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Sear the meat in the clarified butter, for 1 minute on each side.
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Pepper generously on both sides.
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Place the meat on the bed of salt, Cover completely with the remaining coffee salt.
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Press the coating down with your hands.
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Bake for 20 minutes.
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Reduce the temperature to 175F degrees. Bake for 1 hour.
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Peel & dice the shallots.
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Sauté the shallots in butter until translucent they caramelize.
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Deglaze with whiskey.
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Add the broth and reduce by half.
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Add espresso and cream.
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Mix the cornstarch with 1/4 cup of the liquid, then whisk it into the sauce.
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Cook for another few minutes, whisking.
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Season with salt and pepper. Set aside in a warm place.
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Break the crust off the meat, and transfer it to a platter.
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Cut into slices and serve with the sauce.