aloo gobi (with sweet potatoes)

i was flipping through the channels one night and caught "the spice goddess" show on the cooking channel. she was making cauliflower with sweet potatoes - seemed easy enough so i found the recipe and made it a few days later.  this is a good thing to try if you've never fixed indian at home - no weird spices required, so you won't have to make a run to the international market just to make this.  the recipe doesn't note this, but on the tv show she ended up adding some water to the mixture (which i did). it ended up a bit mushy (due to the water & way longer cooking time) but i like it that way.  i also added some cayenne pepper.  not the most photogenic dish, but it IS tasty:

turmeric sure does make things super yellow