I came up with this by combining other recipes. We keep a small slow cooker in our camper and I often make this when we go camping. I just throw everything together before we go to sleep and it's ready for us in the morning.
This came from a kids cookbook so it's really easy. If you don't want to, you don't even have to wash the casserole pan when this is gone. You can make this an indoor recipe by cooking it at 350F in a casserole dish in the oven for an hour or so.