in a large kadai add 2 tsp oil add chopped onion. saute for a minute.
now add chopped ginger and garlic. saute for a minute. you can also add green chilli if you prefer spicy.
next fry chopped capsicum.
add tomato sauce, chilli sauce add salt to taste.
add 2 tsp of soya sauce and vinegar. give a good stir and cook for a minute.
now add the deep fried idlis and give a good mix. coat the idli pieces well with sauce.
lastly add some chopped spring onions greens and mix.
serve with veg fried rice or mushroom fried rice.