Take 1-2 plantain, 1 medium-sized brinjal, 2 small ridge gourds, 1 large, sweet potato, large potato and cut them properly.
Heat 2-3 tsp mustard oil and temper with 1 tsp mustard seeds, 2 dried red chilies and 4-5 Methi seeds. Add the potato, sweet potato and plantain to this. Stir fry this on high heat for 3-4 minutes and then cover and cook them till they have softened to about 80 percent. Then add the ridge gourd and the brinjal. Sprinkle salt and sugar and stir for 2-3 minutes.