Directions

1. Preheat oven to 350 degrees. with rack on lowest shelf. Make crust: In a food processor, pulse graham crackers, sugar, ginger, and salt until finely ground. Add butter; pulse until mixture forms large, moist crumbs. Press crust into bottom and up sides of a 9-inch pie plate.
2. Make filling: In a large bowl, whisk together eggs and sugar until combined. Add sweet-potato purée, half-and-half, lemon juice, vanilla, salt, and allspice; whisk until completely smooth. Pour filling into crust; smooth top with a rubber spatula.
3. Place pie on a baking sheet, and bake until filling is set, 40 to 50 minutes. Transfer pie to a wire rack to cool completely, about 2 hours. Pie can be prepared up to a day ahead and refrigerated; serve chilled or at room temperature.