Whether you love it, hate it or are totally baffled by it, there’s no denying the enduring presence of SPAM. In essence, SPAM is an affordable, pre-cooked, shelf-stable protein. If you haven’t heard of it or don’t cook with it, keeping a can or two in your pantry could transform your life. You know those moments when you forget to defrost meat before preparing dinner and now you’re stuck with a meat popsicle? SPAM can solve that. It’s a flexible option that you can add to a number of your favorite dishes, including weeknight dinner staples like grilled cheese and pizza. But first, it helps to know what it is and how to use it. What Is SPAM Made Of? Despite its success, SPAM has a bit of a reputation as mystery meat. So what is SPAM exactly? It consists of six ingredients — pork, salt, water, potato starch, sugar and sodium nitrite (a kind of salt …