Potluck/Carry-in/Mannafest Meal

We're having a Mannafest Meal at our church on Sunday...that's code for potluck or carry-in. I'm supposed to bring either a 9x13 casserole dish to share or a crockpot dish. I know there's all kinds of things I could bring, but I'm coming up blank on anything I want to bring. Any suggestions? I'm toying with the idea of trying something new, so if you have a recipe that you think would work, send it my way! :)