Pressure cook tuvar daal/lentil for 3 whistles ,with just enough water, 1 chopped tomato and 3 slit green chillies.
Blend 3 slices of pineapple with a cup of water and make a smooth paste.
Take a pan, add boiled and mashed lentil ,pineapple puree,pineapples pieces(1 cup) chopped
ginger,1 chopped tomato and all the spices and approx.2.5 glass of
water.(can adjust the thickness according to your choice
Boil on medium heat for 8 minutes.Add the tamarind pulp only if you like to make it little sour
Heat ghee in a small pan,add mustard seeds and cumin seeds ,when they start
crackling add asafoetida,curry leaves and whole red chilli pieces .when
done add a pinch of kashmiri chilli powder and pour over the boiling rasam.and cook for 2 minute.
Garnish with fresh chopped coriander.
Serve with a spoon of ghee on top(optional)
Serving suggestions-best served with vada ,idli aur boiled rice