[kt1449]

You said they like mexican, something that I make when I have a lot of people over is tacos.
You can do a pan of beef and a pan of chicken tacos, which are amazing!
Just cook up chicken, shred it, then prepare it the same way you would beef as directed on the back of the flavor packets.
You can make up like a dip to have before dinner...mix up velveeta with salsa makes a good meat free queso dip. That way people can take beef or chicken, add their own toppings.
Make up a couple boxes of spanish rice to go on the side. Or there are even some good recipes online for like mexican cornbread.

Another idea would be like some kind of chicken casserole. My mom used to make chicken rice casserole...just veggie rice, cream of chicken soup, cooked chicken, maybe an extra can of peas, pour it in a big casserole dish, top with crushed cracker crumbs.