Egg custard tarts are a popular dessert in dim sum restaurants. The Thermomix makes it easy to create the smooth and creamy custard filling for these tarts. The filling is made with eggs, sugar, milk, and vanilla extract, and is poured into pre-made tart shells. The tarts are then baked until the custard is set and the crust is golden brown. These tarts are a sweet and satisfying way to end a dim sum meal.