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1
Lay tenderloin on a cutting board and cut it in half across the width. Butterfly each piece by making a lengthwise cut to within 1/4 inch of the other side. With a meat pounder or heavy mallet, pound to between 1/4- and 1/8-inch thickness.
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2
In a food processor or blender, thoroughly puree the chipotles with the adobo sauce; reserve 1 tablespoon. Spread remaining pureed chipotles on both sides of the pork. Cover and refrigerate for at least an hour or up to 24 hours.
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3
In a small saucepan, bring the orange juice just to a boil. Add the sun-dried tomatoes, stir well, cover and remove from the heat. Let stand, stirring once or twice, until softened, about 20 minutes.
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4
Scrape the softened tomatoes with juice into a food processor or blender; add reserved chipotle puree. Pulse the processor until the tomatoes are rather finely chopped (but not pureed). Scrape into a small serving bowl. Add the onion, olives, cilantro and lime juice. Stir together, taste and season with salt if needed. Set aside at room temperature while you cook the pork.
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5
Set a large, nonstick skillet over medium-high heat. Add the oil, brushing or spreading around to evenly coat the surface. When the oil is very hot add one of the pork pieces. Sear until browned, about 2 to 3 minutes. Turn and sear the other side, about 1-2 minutes. Transfer to a baking sheet and keep warm. Sear the remaining pork.
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6
Chop the pork into 1/2-inch pieces and scoop into a warm serving bowl. Set on the table along with the salsa and warm tortillas.
