hùhng dáu yuht béng
紅豆 is red bean) (紅 is red, and 豆 is bean). 月 is moon, and 餅 is a round pastry or cake, so 紅豆月餅 is red bean moon cake.
Moon cake filled with red bean paste (made from adzuki beans)).
moon cake
lotus seed moon cake
pineapple moon cake