Soak the glutinous rice overnight, then rinse under running water. Blend the rice in a blender until it becomes a fine, smooth flour. Place the flour in a cloth bag and hang it up to drain overnight before making the rice balls.

If using wet flour, you don't need to add much water, so the dragon fruit syrup color won't be very vibrant. If the flour is dry, the color will be a brighter red. Using freshly ground glutinous rice at home gives the best flavor, similar to making homemade rice noodles or bánh canh. Boil the rice balls as you would with other similar desserts.

For the filling, use black beans, which will give a darker color. Steam the black beans until cooked, then blend them with sugar and ginger. Boil the rice balls until they float, then transfer them to a bowl of clean water.

Place the rice balls into a pot of syrup made by boiling water with thinly sliced fresh ginger and palm sugar. Simmer for about 2 minutes, then transfer to serving bowls.

Ladle the ginger syrup over the rice balls and serve hot for the best flavor, with the spicy warmth of ginger. Absolutely delicious!