I first tried to cook the crust with a little water in the bottom of the crock-pot. But found that this just made my crust portion doughy. I then tried it with just crust in a pan set in the bottom of the crock-pot. This worked great.
The first picture is the bowl I used. Really any cooking pan that you can use in the oven will work in the crock-pot. It just needs to fit in the crock-pot and you need to be able to get it out. The second is this bowl sitting on the bottom of the crock-pot. Just trying to give you a better visual.