Tart shells are pastry bases used to hold sweet or savory fillings. They are typically made from a mixture of flour, butter, sugar, and eggs, which is combined to create a dough. This dough is rolled out and pressed into a tart pan, then baked until golden brown. Tart shells can be made in various sizes, from mini tarts to large, shareable ones. These shells serve as the foundation for many delicious desserts, such as fruit tarts and chocolate tarts, as well as savory dishes like quiches. Once baked, they can be filled with a variety of ingredients, making them versatile for different culinary creations.