This is a simple, but intensely flavored salsa that can be made a day ahead and refrigerated until served. If you can't find slab bacon, substitute an equal amount of lean Canadian bacon. To make the chipotle puree, use a food processor, food mill or blender to blend canned chipotles in adobo. This salsa has a medium heat, but you can lower that by removing the seeds from the chipotles before pureeing them. This is great for a Super Bowl party. This recipe is from the November 2007 issue of Chile Pepper Magazine.