1/2 Onion, cut into small pieces
2 or 3 Green chile, cut long
1/4 tsp. Turmeric powder
1/2 tsp. chile powder
1/4 tsp. methi (uluva/fenugreek) powder
1/4 tsp. cumin (jeerakam) powder
1 or 2 zuchini squash/chayote squash/green apple (grannysmith), cut into pieces
2 c. Yogurt (wholemilk one is better), whipped well.
Heat oil, fry mustard seeds, then add onion, green chile and stir for a while.
Then add curry leaves (optional), and then all the powders and salt. Stir for a few seconds, then add the veg. pieces, and a cup of water. Cover it and cook. When cooked, take it off the stove, and after a while (when cooled down a bit) add the yogurt to it, stir well.
And it is ready!
Note: (You can use ripe mango instead of squash/apple if you like. Also, you can add coriander leaves if you like.)
Source: Mareena Yesudas