Saute the onions and garlic in some of the oil.
Put into pressure cooker: hominy, broth, chile sauce, onion/garlic mixture, pork, cumin, salt.
Stir in a tablespoon or two of oil. (Keeps things from spattering inside the cooker.)
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.