Tart cherries, also known as sour cherries, are small, red fruits that have a tangy flavor. They are commonly used in cooking and baking, especially in pies, jams, and sauces. Tart cherries are rich in antioxidants and vitamins, making them a healthy addition to the diet. These cherries are typically harvested in late spring to early summer. They are often found in varieties like Montmorency and Balaton. Tart cherries can be enjoyed fresh, but they are also available dried or frozen, allowing for year-round use in various recipes.