Cover tofu with 2 sheets of tissue and press out water within it.
Cut tofu into small pieces and marinate it with 1 tbsp soy sauce and chilly sauce.
Fry tofu in oil till slightly brown, and lay it over a tissue to absorb excess oil from it.
In the same oil, saute sliced mushrooms for 4 minutes and add carrots and celery. After 1-2 minutes add ginger-garlic paste.
Add onion to it and saute it for 2 more minutes.
Add capsicum to it and cook for 2 minutes. Add little salt(only little salt to be added as soy sauce will have salt). Add 1 tbsp of soy sauce and chilly sauce.
After 1 minute remove from flame.
In a pan boil a mixture of corn flour and 3 tbsp of soy sauce and 1 tbsp chilly sauce with 1 cup of water.
When this mixture boils and starts to become thick, add the tofu also to it. Boil for about 3 minutes and add the sauted vegetables to it. Cook till the whole gravy thickens.
Serve hot over a plate of white rice or fried rice.