My local woolworths is now stocking a variety of organ meats, tongue, liver, heart and kidney from cows, lambs, and chicken. I'd love to have a go of it, but my housemates want nothing to do with it.

What's the best to start with, as an introduction? What does it taste like, compared to muscle meat? And what's the best way to cook these to make them look visually appetising to some very fussy friends?