Heat oil in bottom of pressure cooker.
Add the onions and garlic and saute for a few minutes.
Add into pressure cooker: hominy, broth, chile sauce, onion/garlic mixture, pork, cumin, salt.
Cook under pressure for about 100 minutes. Release pressure.
When the pressure has gone down, check to be sure hominy is done. It should be fully "bloomed" and tender but still a little chewy. Pressure cook a little longer if necessary.
Serve with any or all of the following: sour cream, grated cheese, fresh lime wedges, cilantro.