I steamed it in low - medium flame. After the first 25 minutes, check the water level and add more water, if required. The cake should be done in 35 - 40 mins, ideally. So check it at around that time. I made the cake in a 6 inch round aluminium tin. You can store the cake at room temperature upto 3 days and can be stored in the refrigerator upto 5 days. If kept in refrigerator, microwave it for 10-15 seconds before serving.