Rosemary Marlin with Roasted Corn and Tomato Relish

To make the marinade, place 1/2 cup olive oil and 1 sprig of rosemary into a resealable plastic bag. Add the marlin steaks, seal the bag, and turn gently to evenly coat the fish. Refrigerate for 1 hour. Pour 1/4 cup olive oil into an oven-safe 10 ...