Slit the skin, rub the meat with salt and pepper. Heat the melted butter and fry the pork. Cut onion into quarters, slice coarsely carrots, add in the pork. Pour 1 glass of water , add the thyme. Bake on the lower level at 200 degrees Celsius for 1,5-2 hours. Pour the dark beer in 30 minutes before the meat is done. Remove the stew from the form, pour some water over the broth and rub the recieved sauce through a sieve, salt and serve.