Vegetarian Recipe: Fried Purple Yam Balls Posted by Susan Siow | Oct 7, 2011 | Crispy, Updates, Vegetarian Recipes The vegetarian recipe for ‘Fried Purple Yam Balls’: Ingredients 500g of purple yam (peel, steam, crush) 1 cup of tapioca starch Method Combine purple yam + tapioca starch. Roll the dough into balls. Fry until golden brown, dish out, drain and serve.