I love pairing a great steak with vegetables....I've done with with mushrooms as well, and it turns out great http://tiny.cc/ov06a
Grilled Steak with Pepper Relish
From EatingWell: July/August 2010
Here, we toss colorful bell peppers in a balsamic-herb vinaigrette and grill them in a foil packet at the same time as the steak. Serve with corn on the cob.