I like to use the shredding disk of my food processor to shred cabbage. It is lightning-fast and also kind of fun to do. I think stores also sell cabbage that is pre-shredded, or even shredded and mixed with carrots as "coleslaw mix," but I haven't tried that. I've never heard of rinsing shredded cabbage. Though I've often wondered if just rinsing the outside of a whole cabbage cleans it enough, so I suppose rinsing the shreds could be a way to clean it all over?

There's a recipe for a cabbage pancake that I love, which doesn't use any cheese and doesn't impersonate a pizza. I'd be happy to share the link if you'd like.