Seven minutes. According to the website of personal library, wax gourd can be cooked in microwave oven with high heat for 7 minutes. Wax gourd is the only fat-free vegetable in fruits and vegetables, and its sugar content is extremely low. Propanolic diacid contained in it can inhibit the conversion of sugar into fat, which is beneficial to the swelling of water and can remove excess accumulated fat in the body, and can be used to lose weight.