resernas

Resernas are a traditional form of handcrafted, non-alcoholic fermented beverage originating from the coastal regions of Portugal, particularly in the Algarve. The name "reserna" is derived from the Portuguese word *reservar*, meaning "to reserve," as these drinks were historically prepared and stored for later consumption. Resernas are often made from a variety of fruits, herbs, and spices, which are fermented in water or a light fruit syrup, resulting in a lightly effervescent, tangy, and refreshing drink.

The preparation of resernas typically involves soaking fruits such as citrus peels, berries, or tropical fruits like mango or pineapple in water or a simple syrup. Herbs such as mint, rosemary, or lavender are also commonly included to add flavor complexity. The mixture is left to ferment naturally over several days or weeks, during which time the sugars in the fruits are converted into carbon dioxide and small amounts of alcohol, though the final product is usually non-alcoholic or contains trace amounts. The fermentation process gives resernas their characteristic slight fizz and slightly sour taste.

Resernas are often enjoyed chilled as a refreshing alternative to alcoholic beverages. They are popular during warm weather and social gatherings, particularly in coastal areas where fresh fruits and herbs are abundant. While historically a homemade drink, resernas have gained modern popularity as a natural, sugar-free, and alcohol-free option for those seeking a healthier or non-alcoholic alternative to sodas or cocktails. They are sometimes infused with additional flavors like ginger or vanilla to enhance their appeal.