You could say that sangria is a thing here in Pleasantville, a very big thing. We like it boozy, full of berries and even Canadian, but with the addition of this frozen sangria recipe, we're confident we've finally got all our sangria bases covered. Here's your step-by-step guide to making these slushies for adults. After all, why should kids have all the fun? How to Make Frozen Sangria The first thing you need to gather up is your supplies and if you're a true …