Sieve flour, caltrop starch and baking powder. Add water. Stir well. cover with a wet cloth for 20 minutes. Stir in oil. Stir well to form batter consistency.
Rinse beancurd. Soak for 10 minutes in 1 teaspoon of salt and 1 cup of boiled water. Wipe dr. each cut into 5 small pieces.