Kugan, wht I used to do is season mustard,fenugreek & curry leaves...add some onions & saute...add lil tomato,turmeric & saute till pulpy... add vegs of choice, water & cook till 1/2 done... add tamarind juice, baba or selvi brand puli curry masala ,slt & cook further till vegs are almost done...atlast add coconut milk & cook on low flame until it starts to simmer... tht's it...one of this brand's puli curry masala has tamarind in it...I don't remember which one...so just chk the ingredients before adding tamarind juice & adjust accordingly...the taste of my puli curry depends compltely on the masala powder...
Adding tomatoes is optional...U can use meat masala too... both taste good... I used to make veg dhalcha using meat masala(Baba brand) & it will be good too...