What precautions should be taken while cooking a thin steak?
Sounds like it's time for a steak sandwich.  Grill it up in a frying pan, add some cheese and top with sauteed onions, mushrooms and peppers and serve it on a toasted baguette.  You said the steak was thin, so make sure not to overcook it.  Cook up the veggies first, then the steak.

No idea if its halal or not, but it sure will taste amazing.