The Butter & Centella Leaves Tempura (Pegaga Leaves)

1 cup of flour
1 tablespoon cornstarch
1 1/2  cups of water
1 egg
1/2 teaspoon soda bicarbonate
A pinch of salt

1. Very easy, mix all ingredients together and stir it well.
2. You can use this batter for any kind of vegetable or banana.
3. Then deep fry it until it with medium heat fire until the tempura slightly brown.