To make this recipe tastier, use 1 tablespoon more oil and make it spicier by adding more chili powder or more green chilies. You can also add eggplant or tomatoes in this recipe. You can cut down potato to one and add 2 tomatoes or half eggplant. With tomatoes, add it for the last 2 to 3 minutes. If you are making eggplant and potatoes, do not boil potatoes. Instead, follow the above recipe up to the adding water part and then cover the pot and let the vegetables cook until they are fork tender. You can also cook butternut squash same way, with cumin seeds only.