Place the oil into a pressure cooker over medium-high heat. Brown the pork cubes on all sides in the hot oil and stir in the red chillies, onion, garlic, coriander, cumin and beef stock. Lock the lid onto the pressure cooker, bring the cooker up to pressure and reduce heat to keep the pressure steady.
Cook under medium steady pressure for 1 hour, remove the cooker from the heat, place in the sink and run cold water over the lid of the cooker until the pressure has been released. Carefully remove the lid, and serve.