From J. Kenji López-Alt: https://food52.com/recipes/77731-j-kenji-lopez-alt-s-ten-minute-lime-cracker-pie    2   (14-ounce/396ml) cans sweetened condensed milk             2 cups  (470g) heavy cream             1 tablespoon  finely grated lime zest, plus more for serving             1 / 2  cup  (120g) freshly squeezed lime juice (from about 8 limes)             10 ounces  (285g) Ritz crackers (85 crackers, from about 3 sleeves)           Whisk  together the condensed milk and heavy cream in a large bowl until  combined. Add the lime zest and juice and whisk until thickened, about 1  minute. Spread  1 cup (240ml) of the condensed milk mixture on the bottom of a  deep-dish pie plate, an 11-inch (28cm) oval casserole, or a similar  large shallow dish. Top with a single layer of Ritz crackers. Repeat,  alternating layers of filling and crackers, until the dish is full,  finishing with a layer of filling. Cover and refrigerate for at least 2  hours or overnight—the longer you wai...