Mandu

Almost always the dumplings are folded into the shape of a triangle.[i]  

To put the dumplings together you must have a bowl of wrappers, the stuffing, a teaspoon, a bowl of cold water, a small brush, and two large baking sheets that are sprinkled with flour. Roll the dough out on a table dusted with flour and cut it into small squares or circles, one for each dumpling. Take a wrapper and place it in your palm.  Brush all four edges of the skin with a beaten egg.  Using a teaspoon, spoon in the filling.  It should be about the size of a walnut and placed in the center of the skin.  Make sure that there is enough room (about ½ inch of empty skin) on the outside, so you can fold properly.  Fold the skin in half, either in the shape of a triangle or a half moon (depending on the shape of the wrapper, circle or square).[i]  Press the edges together tightly using your thumb and index finger.  The edge should resemble a piecrust.  Repeat until all of the wrappers and/or dumpling filling is gone.