Steamed Fish with Scallions and Ginger

The most memorable steamed fish I had was one I caught while visiting my sister, who was renting a house up in Bar Harbor, Maine. I was just learning to fish, and had wandered to the fishing pier, down a long flight of log stairs and through a pine forest to a deep, rock-lined portion of the coast. While Jen used a bait net to grapple with an uncooperative lobster, I threw out a weighted line bearing a plastic worm with a bright-yellow spiral tail, let it hit bottom, and sl