This savory asparagus tart is the perfect method to delight in (or imagine) a lovely spring day! Start with a puff pastry crust that's as light and flakey as the season, then pack it up with Fontina cheese, fresh asparagus, and prosciutto. The flavors are next level, however the dish is in fact quite easy, and expert baker Liz Shim is here to simplify step-by-step. Plus, she shares the fundamentals of dealing with puff pastry– and yes,…