I got the idea for this recipe from Chef Hilary at The Hil. She had tempura fried bok choi on her vegetable plate and it was delicious. I looked up a tempura batter recipe and realized it was quite easy. I served the vegetables over brown rice with miso soup. Delicious.
from the Joy of Cooking
Whisk together in a medium bowl until blended:
1 cup all-purpose flour
1/2 teaspoon salt
1/8 teaspoon ground black pepper
In a separate medium bowl, whisk together until blended:
1 cup cold water
Combine them and mix with a fork just until blended. The batter will be lumpy. Use immediately. Fry in 3 inches vegetable oil.