Rinse mushrooms, wipe it off with a tissue to remove the moisture then slice them thin.
In a mixing bowl mix all the ingredients under 'for the batter' add little water to form a thick paste.
Marinate mushroom in it for 15mins.
Deep fry them until crispy and golden brown. Drain them in a tissue.
Get all the ingredients ready for the manchurian.
Heat oil in a pan and add garlic and spring onions white part saute for a minute. Add onion saute until slightly browned,
Then add capsicum, half of spring onions and saute for 2mins. Let the onions and capsicum retain its crispiness and do not let them turn brown.
Then add soya sauce and mix well in high flame. Now reduce the flame and add green chilli sauce,tomato sauce and required salt.
Add cornflour mixture and bring the sauce to a quick boil. Add fried mushrooms, pepper powder and give a toss for the sauce to coat well.
Garnish with remaining spring onions green part, give a quick mix and serve hot.
Serve hot with any fried rice of your choice or just as a starter. Serve Mushroom Manchurian immediately before it becomes soggy.