his is the special potato palya or potato stir-fry that is filled into masala dosa, though I make this recipe on its own quite a bit as well. The potatoes are spicy and tangy and cooked with a little butter until they are soft enough to melt in your mouth. You can apply the same technique to steamed sweet potato or squash, such as butternut, acorn, or kabocha, which is wonderful as a dumpling filling.