Possibly cook the BBQ sauce from mümmelchen beforehand
Peel the onions and cut them into rings. Cut the roast pork into thin slices and season with a little oil, salt, pepper and the steak and gyros spices. I do it in portions in a small bowl.
Put half of the onions in the pot, place the meat on top and cover with the remaining onions. Pour the BBQ sauce over it. Let cook for 7 - 8 hours on LOW level.
Enjoy! All you need is bread or chips and a green salad.