Remove the skin of the pineapple. Cut the pineapple and banana into small cubes
Heat ghee in a pan add pineapple pieces, turmeric powder, chilli powder and 1 tbsp of water, salt and cook on medium flame, stirring often till the fruit is half cooked
Now add the banana and the grapes, mix well, add some more water, close with a lid and cook on low flame till it is properly cooked
Meanwhile grind together the coconut, mustard seeds and green chillies with minimum water into a smooth paste
Once the fruits starts turning mushy add the ground masala, mix well and cook on low flame for 2 minutes
Add sugar and check for salt. Mix in the yogurt and switch off the fire
Heat coconut oil in a pan, add mustard seeds and once it splutters add red chillies and fry for few seconds. Add curry leaves, mix well and switch off the fire. Pour this on the prepared curry