Step by step

Seal the pasty by folding it over into a half-moon, using a particular movement with your left hand to create the curvy shape in the pastry, and sealing with your right

Tips
If you want to follow the authentic and traditional Tibetan method of making your momos, after steaming you should cook them in butter or on a hotplate.
Trivia
In fact, although momos are typically Tibetan, you can also find them in other countries nearby, where the Tibetan diaspora live, like Nepal or Bhutan.