Well, I am just trying it for the first time today, so I won't know how it will turn out, but I am making chicken parmesan in the crock pot.
Rub 1 Tb olive oil on the inside surface of the crock pot. Dip chicken breasts in egg, than a mixture of Italian bread crumbs, parmesan cheese, salt and pepper. Place in crock pot, top with mozzarella cheese, then marinara sauce. Cook for 3 to 4 hours on high, or 6 to 8 hours on low. Serve with pasta.
There is also a crock-pot cook book called "Fix It and Forget It!" - I get a lot of good recipes from there!
ETA: Turned out pretty good! But next time I will save some mozzarella to top the chicken at the end so I have ooey-gooey melted-cheese yumminess on top, instead of it all being mixed at the start and essentially "disappearing".
ETA