In Spain, a burnt-sugar custard served with a flaming brandy sauce. Elsewhere, a name applied to a variety of custards, one made in a pastry shell, another with jellied fruit, etc.
The dessert you are referring to is called a “flan”. Flan is a round tart that typically has a filling of cheese, fruit, or custard. The shell is free-standing and is made of pastry. Flan shells are usually made on baking sheets inside special flan rings, which help to give the tart its distinctive shape. After baking, the flan rings are removed to reveal the finished tart. Flan is a popular dessert in many countries, and can be found in various forms and flavors. It is often served chilled and can be enjoyed on its own or with a topping such as whipped cream or caramel sauce.