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1
To marinate the pork:
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2
Blend cilantro, brown sugar, soy sauce, shallots, garlic, lime peel and juice, and hot sauce in a food processor until nearly smooth. With the machine running, gradually blend in the oil. (Makes 3 1/2 cups; use half for marinade and reserve other half for prepared sandwiches).
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3
Cut the pork loin crosswise into 1/3-inch-thick slices (about 20 slices total). Place the sliced pork loin in a large resealable plastic bag. Add 1 1/2 cups of the marinade and turn the pork slices to coat it all over with the marinade. Twist bag to remove air then seal the bag and refrigerate for 4 hours. Cover the remaining marinade separately and refrigerate.
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4
To prepare the sandwiches:
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5
Prepare the barbecue for medium-high heat. Working in batches, grill the pork slices until just cooked through and still moist and juicy, about 1 1/2 minutes per side. Discard the used marinade. Transfer the pork slices to a large clean platter (do not pile up the slices too much or they will overcook).
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6
Spread the butter over the cut sides of the buns and grill the buns, buttered side down, until they are toasted, about 1 minute.
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7
Pile the pork slices (about 5 slices per bun) on the bun bottoms. Drizzle a spoonful of the remaining unused marinade over the pork. Top with the coleslaw then the bun tops and serve immediately.