Use a nonstick skillet if possible. Add oil to the cold pan, then place the frozen dumplings in. Add enough water to cover about 80% of the dumplings. Turn the heat to high. Once the water boils, reduce to medium-low heat.

The dumplings will gradually puff up as they cook. Gently shake the pan occasionally to prevent sticking or burning. If the water evaporates too quickly, add more so it comes halfway up the dumplings. When the water is almost gone, flip each dumpling over.

Pan-fry both sides of the dumplings until the skins are golden brown. Watch closely to prevent burning. The whole process takes about 15 minutes. Serve hot.