I like the kebab idea too. I also think many people would enjoy the grilled portobellos. Also, I don't know if you've tried these, but President's Choice has frozen portobello swiss burgers that are VERY juicy and tasty. (Wouldn't help if you have guests who don't like portobellos or mushrooms, period, of course.) You can get the burgers at Loblaws, Independent, Zehrs, Fortinos, etc. - not sure if you have any of these nearby.
"If you're not chasing after miracles, what's the point?" The movie Saint Ralph
"What it all comes down to
Is that everything's gonna be fine fine fine
I've got one hand in my pocket
And the other one is giving a high five" - Alanis Morisette, Hand in My Pocket