- First peel the skin of ridge gourd and cut it into 2 inch cubes and set aside. In a pan heat oil and add mustard seeds, fennel seeds and cumin seeds. When mustard seeds starts pops add chopped onion and green chili and fry for about 6 minutes. Then add ginger-garlic paste and fry for 1-2 minutes. To this add spices and then add chopped tomato and fry until it become mushy. To this add chopped ridge gourd,salt and water cook until gravy thickens. Turn off the flame and serve hot with rice.