It’s not always as easy as pie to eat healthily, especially during a season when so many meals seem to end with one. Here’s a little help: When making your own piecrust, use Earth Balance Shortening ($3 for 15 ounces at Whole Foods Markets and Trader Joe’s). Unlike the usual brands, this one — made from palm-fruit, soy, canola-seed, and olive oils — is free of trans fats and hydrogenated oils. And crusts still come out nice and flaky. Turns out you can improve on a classic.