This adaptation of Alice Waters’s lemon meringue pie, which came to the Times in a 1987, takes a little time, but your efforts will be rewarded with a spectacular centerpiece dessert: a cloud of toasted meringue atop a pool of buttery and bright lemon curd in a light and flaky crust. If you can’t find Meyer lemons, which aren’t as tangy as regular lemons, and have a spicy, floral note, regular supermarket lemons will make a worthy substitute. This recipe makes an elegant pie with a…