Divide lotus seed paste into small portions and knead into little balls.
Peel, rinse and thinly slice the taro. Dish up and steam until tender. Mash it and add in glutinous rice flour, vegetable oil and sugar while it is still hot. Knead it into a soft dough and divide into portions as the skin ingredients.
Stuff a lotus seed ball into a portion of skin, knead into balls and arrange onto a greased dish. Steam over high heat until thoroughly cooked.
Sieve soy bean and green bean powder. coat half of the taro balls with soy bean powder by rolling them in a plate and the remaining half with green tea powder. Dish up and serve.