Just throw in something you would normally roast and add a bit of a sauce of some kind. Not a lot, it doesn't take much liquid. For example:

Wash a chicken. Put it in the pot. Blend a can of cream of chicken soup (with herbs if possible) with a few splashes of sherry. Pour over top. Cook on low 8 hours more or less. Doesn't look pretty but it tastes good.

Do the same with a pork loin and golden mushroom soup.

Put in a chuck roast. Mix up a cup of chopped tomatoes (canned/stewed is fine) and a chopped onion, a bay leaf, salt, pepper, dashes of marjoram or oregano. Cook on low 8 hours more or less.

Put in a beef brisket (not corned beef, although that can be done easily in the crock too). Mix up a small bottle of bbq sauce and a beer, doctor with whatever you like (jalapenos, etc). Cook on low 8 hours more or less.

Skin a bunch of chicken legs, toss in the pot. Cover with a jar of marinara/pasta sauce, splash of red wine, garlic if desired. Cook on low 8 hours more or less. Serve over fettucine alfredo. Make you wanna slap your momma.