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["Coat 8-inch square baking dish with cooking spray; set aside.", "Preheat broiler.", "Bring medium saucepan of lightly salted water to a boil.", "Add macaroni; stir to prevent sticking.", "Cook until just tender, about 6 minutes.", "Drain well and set aside.", "Meanwhile, in food processor or blender, whirl bread to coarse crumbs.", "Transfer to small bowl.", "Stir in cilantro, salt and mustard and set aside.", "In large saucepan, melt butter over medium heat.", "Add onion, chipotle and scallion and cook, stirring often, until onion is tender, about 4 minutes.", "Stir in flour.", "Cook, stirring, until mixture is fragrant, 1 to 2 minutes.", "Stir in 1/4 cup soy milk until no lumps remain.", "Stir in another 1/2 cup milk until smooth, then remaining 3/4 cup milk.", "Increase heat to medium-high and cook, stirring, until mixture boils gently and thickens enough to leave a track on bottom of pot behind spoon, about 2 minutes.", "Stir in ""cheese"" just until melted.", "Stir in macaroni until coated.", "Transfer macaroni mixture to prepared baking dish and sprinkle with reserved crumbs.", "Broil just until top is browned, about 1 1/2 minutes, watching carefully to prevent burning.", "Serve hot."]
