Step by step

Make the kopan masala by grinding together the following spices: black pepper, cumin seeds, cardamom seeds, coriander seeds, cinnamon, cloves, nutmeg

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.
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.