This is the best tasting dish ever! It smells great while cooking! If you can find a place to get a cleaned pig stomach from a butcher, you are so lucky. I have never cleaned one myself (you have to remove an inner and an outer layer, and leave a pink stomach without any extra holes in it). It is similar to sausage casings, but in an oblong shape. You can sew the ends shut with poultry twine, or pins. In Germany, it is called "Saumagen" and served on a bed of sauerkraut. My husband was thrilled to discover this! I still prefer it "just so" (as is)...