Well now, as long as we're talking about Chang's, I like Mongolian too! And you can bet I'll get 2 bowls worth! But still remain flexible to any specific taste buds out there.
as far as time goes, I would opt for 6 PM if that fits everyone else's schedule. Should give us enough time to get home first and still make it there. Unless we have someone from further away attending (like across the river?). Then, like Art says, they should have the say so on when!
John