First, don’t confuse “picadillo” with “peccadillo,” although I often slip into that malapropism. While picadillo tacos are not the least bit sinful, they can give you the same guilty pleasure as nachos for dinner. They fall into that category of slightly messy finger foods that go well with the football playoffs. A quick-cooking alternative to chili, this Cuban-style mélange packs a sweet and tangy punch. It starts with a tomatoey sofrito of aromatics and peppers, then adds a Mediterranean accent with raisins, capers and chopped olives. I first made picadillo from a Boston Globe recipe in 2001. I amped up the flavors and seasonings, figuring the “pica” stands for “picante.” When I finally had…