Red beans (also known as azuki or adzuki or aduki) are often used in Asian desserts. I would eat them in sesame balls, in soups, in buns, in pancakes, in popsicles, or even just in sugar water.
Ironically enough, I was introduced to red bean shakes by one of my non Asian friends. In fact, he was as all American you could get, a white boy from St. Louis, but he had quite the case of yellow fever 😉
With this recipe, you could also freeze the shake to make popsicles as well.
3/4 cup azuki beans
1 cup crushed ice
1 cup milk (regular, almond, or soy)
3/4 cup coconut milk
1/4 cup sugar
Put red beans in rice cooker (2.5 to 3 cups water for every 1 cup beans) to cook. Crush ice in blender, and add azuki beans, milks, and sugar. Blend. To increase thickness add coconut milk.