You can make lasagna in the crock pot. I also use it for making refried beans from dry beans. You can also make bread in it.
Another favorite of ours is lentil rice casserole:
1/2 c. brown rice
3/4 c. brown lentils
1/2 tsp basil
1/4 tsp each of oregano, thyme, and garlic powder
Cook on high for four hours. You can eat it with cheese, in a tortilla, or the absolute yummiest way, with cheese inside a taco shell wrapped in a fluffy mission-brand tortilla (carbs much?
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It's good for making roast as well, which cooks in liquid, which makes it very tender, but you don't actually eat the liquid (unless you want to make it into gravy) When you do this you would just put in some baby carrots, potatoes, and the roast with a package of onion soup mix and water to almost cover the roast. You have to cook it for like 14 hours until it's really tender and then it's great! If you just cook it until the meat is hot then it's still tough (no, I do not eat meat, but I used to, in case anyone recognizes me from the vegetarian board).