Wash the tofu well, pat dry and slice into cubes.
Chop the onion finely. Grate the ginger and mince the garlic. Cut capsicums into cubes. Separate the spring onion whites and greens and chop finely.
Take equal quantities of maida and corn flour in a bowl. Add salt, pepper and oil and make a thick batter with a little water.
Heat oil for deep-frying in a kadai.
Toss the tofu cubes in the batter and coat well. Gently drop the batter-coated tofu pieces into hot oil and fry till they turn a warm brown. Remove onto paper napkins.
Mix together tomato ketchup, soya sauce, vinegar, white pepper powder, ajinomoto, green chilli paste, red chilli sauce and sugar in a bowl. Add a little water and blend well. Keep aside.
Remove excess oil from the kadai and keep about 1 tsp of oil in it.
Add the grated ginger and finely minced garlic and sauté.
Add the chopped onions and spring onion whites and fry till they become slightly translucent.
Add the bell peppers and mix well.
Gently tip in the sauce slurry and blend nicely. Drop in the fried tofu cubes and toss well.
Garnish with spring onions greens and remove.
Serve Ginger-Garlic Tofu Vegetable Stir Fry with Steamed Rice or Noodles.