Tiny seeds about 2 mm across, usually white, red or black, from an Andean plant now also grown in northwest China and Yunnan. They are rinsed to remove a bitter coating and cooked like rice.
藜麦 took off in China around 2015 with the rise of 健身 (jiànshēn, fitness) and 轻食 (qīngshí, light/healthy meals) cafes. You will see it in salad bowls and weight-loss meal plans.