The headliner in the countrified knotty pine Magnolia bakery is the Deserted Island Pie—an inspired, if sugary, combo of marionberries, raspberries, strawberries, and Granny Smiths—but the stunner is the marionberry pie, tart-sweet and extraordinary. Alyssa Lewis makes her crusts with leaf lard, the light, ephemerally crumbly gold standard of pie pastry.