Tongue is another meat that does not have the best reputation. But if you think about it, the tongue of any animal is pure muscle meat, even though the texture is rather different from say steak. I have always loved tongue so when I saw an entire beef tongue on offer I couldn't resist.
Some people say it's dog food, others love it. Tripe is a typical poor man's food of the past, but in Germany is has become almost forgotten, except in Swabia. My mother was born near Stuttgart, and in her youth she learnt to prepare all the traditional Swabian dishes. This is how she cooks tripe.
For a change, here is an almost vegetarian dish, but it is easy to make it completely vegetarian.