Peel the onion and cut into small cubes.

Peel and core the apples and also cut them into small cubes.

Set the crock pot to high and add the butter, onion and apple cubes to it.

Place the pork belly slices on top and then add the sauerkraut.

Add the caraway seeds, bay leaves, juniper berries, vegetable broth, and apple cider or beer.

Season with brown sugar, salt and pepper and cover with the crock pot lid.

Cook on high for about 2 hours or for 4 hours on low.

Mix the corn starch with water, add to the crock pot and mix well.

Cook for another 2 hours on high or another 4 hours on low.

Remove bay leaves and juniper berries before serving.