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1
Put oven rack in middle position and preheat oven to 450u00b0F.
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2
Heat 1 inch oil in a 4- to 5-quart heavy pot over high heat until it registers 375u00b0F on thermometer.
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3
While oil heats, pat steaks dry, then rub all over with spice rub (and salt if necessary). Heat 1 tablespoon oil in a 12-inch ovenproof heavy skillet over moderately high heat until hot but not smoking, then sear steaks, turning over once with tongs, until well browned, about 5 minutes total. Transfer skillet to oven and roast 10 minutes for medium-rare.
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4
Check oil while searing steaks, and when it registers 375u00b0F, begin frying french fries in 2 batches (add fries carefully; they may have ice crystals, which could cause spattering), stirring occasionally, until golden and crisp, 4 to 5 minutes per batch. Transfer fries with a slotted spoon to paper towels to drain and season with salt and pepper while hot. Return oil to 375u00b0F between batches.
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5
Turn off heat under pot, then add garlic and fry until pale golden, 30 seconds to 1 minute, and transfer with slotted spoon to paper towels. Toss fries with garlic in a large bowl.
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6
Transfer steak to a cutting board and let stand 5 minutes. Slice steak and serve with fries.
