GRAVY:
in a large pan, heat a tbsp of oil. add finely chopped ginger and garlic.

Saute for a while.
then add onions and continue to saute for a minute.

Also add capsicum and cabbage fry till the blisters appear over them.

Now add red chilli sauce and soy sauce

Add water first, get to a boil and then add corn starch.

Add more chilli sauce if required and give a mix.

Check for taste, and if you prefer more savory taste then add more soy sauce. give a good mix.
get to a boil and check for consistency.

Now add pepper and salt to taste. remember, soy sauce do contain salt so be careful while adding. give a mix.