Lotus Leaf Buns

Name: Lotus Leaf Buns (He Ye Bing 荷葉餅)
Yield: This recipe makes about 30 lotus leaf buns.
Cuisine: Chinese
Ingredients: 2 tsp dried yeast; 2 tsp caster sugar; 2 tbsp cooking oil, plus more to grease; 500 g strong white flour, plus more to dust