This meal was relatively easy and super affordable! I did not keep track of costs but I know for 12 pans it was under $80. That's all of the ingredients plus the foil, foil pans and ziplocks. Keep in mind the bags can be used again since none of the food touches them so they don't really count in the total cost.
A friend shared this link with me. It has a few great recipes. However I find it to be simpler and less expensive to make more of one recipe at a time and because we have the freezer space I am able to.
I went with the Tex Mex Chicken Casserole and tripled her recipe. Hers makes 4 8x8 pans. Below is the ingredients for 12. I'd say 1 pan feeds 6 adults or 8 children but needs a little filler (chips and salsa maybe?)
Check out these recipes from the previous weeks
Week 1-Bacon Ranch Chicken
Week 2-Baked Sandwiches