Make a larger piece of meat than you need to give you something for sandwiches later.
Warm up your pressure cooker. Add a drizzle of oil and let heat up. In the meantime cut the onions in stripes. Add them to the pot at medium heat until caramelised. Take the onions out and put the seasoned pork in. Sear it from all sides, it will add an interesting depth of flavour.
Once seared add the onions back in and add water to cover the pork.
Close the pressure cooker and let cook for 30 minutes. Once done it should be soft and fall apart.