Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
     1/2                onion -- cut into small
                        -- pieces
   2                    green chiles -- slivered
     1/4  teaspoon      turmeric powder
     1/2  teaspoon      chile powder
     1/4  teaspoon      fenugreek powder
     1/4  teaspoon      cumin powder
                        oil
                        salt
                        mustard seeds
                        curry leaves
   1                    zucchini squash-- cut into pieces
   1                    green apple -- (granny smith), cut
                        -- into pieces
   2      cups          yogurt -- whipped well.

Preparation:

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.)