This smoky and rich sauce takes just about ten minutes to make, and adds unbeatable deep flavor to just about any savory dish. Try serving it over roast pork or grilled chicken or using it as enchilada sauce. We might try adding it to the slow cooker with a hefty pork butt for incredible pulled pork sandwiches. The recipe starts off in a skillet: you cook sliced onion, drained plum tomatoes, unsweetened cocoa, and chipotle chile powder until tender. Then it moves to the blender for a quick puree. You can make it a few days ahead of time and store it covered in the refrigerator.