Fried sticky rice cake sandwich

Ingredients

• 1 big sticky rice cake /nian gao (sliced into ¼ inch thick ,1.5 inch square slices)
• 1 taro/yam (sliced into ¼ inch thick ,1.5 inch square slices)
• 2 large Japanese sweet potato (sliced into ¼ inch thick ,1.5 inch square slices)

Batter:

• 1 cup rice flour
• ½ cup superfine flour
• ½ cup corn flour
• 1 teaspoon baking powder
• 100 ml water
• 1 egg
• 1 teaspoon salt
• 3 cup oil for frying