1. Mix all the marinade ingredients together and put them in a close-fitting container or ziplock bag with the pork. Seal it tightly, put it in the fridge and let it be for a day or so, giving the container a little shake or turn from time to time.
2. Take the pork out of the fridge to come to room temperature for about an hour and preheat your oven to 350 degrees.
3. Put the pork and marinade in a casserole dish with a lid. Use one where all the ingredients fit snugly.
4. Put the covered casserole dish in the oven and time it for an hour, and then turn the heat down to 180 degrees and leave it for five hours. No peeking.