Ceci n’est pas une pie. It’s Pi Day. Ordinarily I’d bake a pie, but with the new “social distancing,” the two of us would have to eat the whole thing. So instead, I made some comforting caramel custard—AKA “flan”—from a forgotten can of Magnolia Brand Sweetened Condensed Milk in the pantry. The can had gone several months past its “best by” date, but rest assured the quality was fine and I had no sense of Russian food roulette. It really burns me how those dates trigger so much needless waste. Using this lost and forlorn can sparked joy—Marie Kondo-style—by both freeing up shelf space and inspiring this dessert. This recipe came right off the…