Cooking a steak with limited utensils?

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I need some help cooking my porterhouse. Normally I either grill it outside, or use a cast iron skillet. I don't have any of those at the moment, so I ask you. How would you cook a 1 1/2 inch bone in, porterhouse steak? I have all the spices, but I can either cook it in a non stick skillet, or in the broiler. How would you cook the steak, and how long would you cook a 1 1/2 bone in steak to get it medium to medium rare?