Final answer:
Poached meringues are traditionally served in vanilla custard, known as crème anglaise, which creates a dessert known as îles flottantes.
Step-by-step explanation:
Poached meringues are traditionally served in custard, known as crème anglaise in French cuisine. This light and airy dessert, often referred to as îles flottantes (floating islands), consists of meringue that is poached in milk or water and then floated on a pool of vanilla-infused custard. The combination of the delicate meringue with the rich creaminess of the custard makes for a classic and beloved dessert.