Stuff dumpling skins with egg and tomato mixture and pinch sides together to form half-moon shape Seal well A bit of water on your forefinger helps
Bring large pot of water to a boil
Drop in dumplings in batches and boil until they float With slotted spoon remove to platter
Eat dumplings with chopsticks and dip in small bowls of black vinegar Dipping sauce may also contain soy sauce minced garlic chopped fresh cilantro and/or red chili flakes in oil