Have you been to momonamission.me?
If you wander back through her posts you can probably find some good ideas. Her big thing is freezer cooking for large groups as outreach and mission through her church. I think she uses the ovens and crock pots a lot, take a peek for ideas about scalable meals that can be prepped cheaply...
It's not a very well organized blog... but the recipes may give you some ideas or you could email her.
If you prep some of the stuff, you may be able to do some teaching. Like, pre measure most things but show how to measure using a liquid measure, spoons, and cups for one or two things.
I'd probably pre prep the stuff for lasagna and then assemble and bake with the guys. Browned meat, pasta sauce, noodles, cheese. Super filling, everyone loves lasagna, meaty but not too meaty. Bread, salad, done.