As Mentioned-the meat itself is not the entire "Halal"procedure.
And not to insult your religious beliefs at all-but it would be far easier to skip the restaurant in question rather than ask/insist that they indulge your request-we are talking about your spiritual needs and not your dietary ones.

I second the idea that you ask the local representatives of your religion for a suggestion.

I might also suggest posing your question on ChowHound.com

As to cooking steak or any meat-Might I suggest Bruce Addails excellent book MEAT-no better recource on the subject.