Clean and cut the pineapple into 1/2" pieces.
Cook the pineapple pieces along with a little water and turmeric powder until it turns soft and tender.
Grind grated coconut, green chillies, garlic, cumin seeds to a fine paste adding half of the yogurt(do not add water).
Add this paste to the cooked pineapple pieces, add salt and mix well. Allow it to boil on a low heat.
5)Whip the remaining yogurt and add to the curry and mix well. Keep stirring continuously on a low heat till the gravy starts to thicken(don¦t allow yogurt to curdle). Remove from the heat and keep it aside(add sugar if it is too sour).
In a small frying pan, heat coconut oil and add the mustard seeds. When it start to splutter, add fenugreek seeds, curry leaves and red chilies. Pour this over the prepared pineapple curry and mix well.
Serve with rice and enjoy!.