This really IS simple. You'll need a steamer for this dish. I don't have a steamer so I used a large roasting pan and I keep on hand 4 cans that have the top AND bottoms removed from them. A good size can would be about the size of the smaller tuna cans, or cat food cans. The ones I use happen to come from La Preferida green chili cans. Whatever can you use, just make sure all are the same size (so your platter doesn't tilt) and that they're the type that you can remove the bottom lid as well as the top (some cans have molded bottoms and can't be removed). Also, the cans can't be too tall or the lid of your roasting pan might touch your food. I use a shallow casserole dish to hold the fish.