need post-dedication lunch ideas for a crowd!

[serenas_song]

Hi everyone! We'll be having up to 24 people over for lunch right after church in celebration of DD's dedication in a few weeks. I need ideas! It has to be something that I could have in the oven or crockpot for up to 2 hours while we're gone so it would be ready when we get back. Only dietary issue is that MIL cannot have acidic foods due to a bladder problem, so preferably not anything tomoto-based. Although if your idea is really good, I could have something else available for her.

thanks!