Chop pineapple slices in to medium sized dices. Put them in a pan adding turmeric powder and a cup of water. Let it cook till soft in medium flame.
As it is cooking, in a mixer add coconut, cumin seeds and green chilly. Grind this to fine puree along with little water.
Include minced coconut puree, salt to the cooked pineapple and let it boil for a minute or two. Switch off the flame and add whisked yogurt.
Heat a seasoning pan adding oil, mustard seeds, split blackgram lentils, broken red chillies and curry leaves. When the mustard splutter pour the seasoning over pachadi.
Comforting rice side dish pineapple pachadi is ready to serve with steamed rice.