Place the dough on a chopping board and use a rolling pin to roll it out quite thin, about ⅛ inch thick. It should not be so thin that you can see through it when you pick it up. After you have rolled out the dough, you will need to cut it into little circles for each momo.
Method 1: The easiest way to do this is to turn a small cup or glass upside-down to cut out circles about the side of the palm of your hand. We use a cup 3 and ⅓ inches in diameter. That way, you don’t have to worry about making good circles of dough, because each one will be the same size and shape. If you make circles this way, you may want to thin the edges of the circle a little bit before adding the filling by pinching your way around the edge of the circle. The idea is to make the edges thinner so that when you fold the dough there won’t be a giant glob of dough in the folded places.
Method 2: Of course, you can also make the circles by the more difficult traditional way. For this, first pinch off a small ball of dough. Next, use your palm to flatten out the ball. Then, flatten out the dough into a circle with a polling pin, making the edges more thin than the middle. This method is much harder to do and takes more time, though many Tibetans still use this method. In this case, the edges are pre-thinned so there is no need to thin them anymore.
Now that you have a small, flat, circular piece of dough, you are ready to add the filling and make the mom shapes. These are many different choices for mom shapes, but for these veggie momos we will use a very common and pretty half-moon shape. This is one of the easier shapes to make.