Today is my husband's birthday and he asked for a huge steak. I got carried away and had the butcher cut a 2" thick Porterhouse. After I got it home, it looks really huge. I'm planning on grilling it, but wondering if I should finish it off in the oven or pull it off the fire of my gas grill after searing it for what, 3-4 minutes a side. He likes it rare. Thanks!