A lemon tart is a classic for a reason: simple, bright, and always a crowd-pleaser. This version features a poppy seed shortbread press-in crust and a puckery, custardy filling that sets on top as it bakes. Both parts come together in a food processor, so assembly is breezy and cleanup minimal—and the result boasts all the flavor and punch of curd without any added stovetop cook time.
