Trà Quất, or kumquat tea, is a traditional Vietnamese drink that is popular in Hanoi. It is made by steeping kumquat fruits in hot water and adding honey or sugar to taste. Trà Quất has a sweet and citrusy flavor, with a hint of bitterness from the kumquat peel. It is often served hot and is believed to have health benefits, such as boosting the immune system and aiding digestion. Trà Quất is a comforting and aromatic beverage that is enjoyed by many in Hanoi.