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["Prepare a grill for medium-high heat; lightly oil grate. Pat pork chops dry and season generously all over with salt and pepper. Place on a rimmed baking sheet and let sit at room temperature at least 30 minutes and up to 1 hour.", "Meanwhile, toast coriander seeds in a dry small skillet over medium heat, tossing often, until golden brown and fragrant, about 2 minutes. Transfer seeds to a cutting board and let cool. Using a flat-bottomed mug or a heavy skillet, lightly crush. Place in a small bowl and add vinegar, sugar, and 1/2 cup oil. Season with salt and pepper and whisk until sugar and salt are dissolved. Set marinade aside.", "Toss jalapenos and 1 Tbsp. oil in a small bowl to coat; season with salt and pepper. Pat pork chops dry again (the salt will have drawn out more moisture) and rub with remaining 2 Tbsp. oil. Grill jalapenos, turning often, until softened and blackened in spots, about 5 minutes. Transfer to a cutting board. Grill pork chops, turning every 2 minutes or so, until cooked through but still medium-rare closest to the bone (an instant-read thermometer inserted near the bone should register 145u00b0F), 8-12 minutes. Transfer to cutting board and let rest 10-15 minutes.", "Cut pork along the bone to remove meat in one piece; slice 1/2"" thick and transfer to a rimmed platter. Slice jalapenos crosswise into rounds and scatter over pork. Pour reserved marinade over and let sit at least 15 minutes and up to 1 hour before serving. To serve, scatter onion over."]
