1. Fill the bottom of a washboiler or large enamel pot with a layer of washed seaweed. Add the water and place over high heat. When water boils, add potatoes and more washed seaweed. Cover.
2. About fifteen minutes later, add the chicken and a layer of seaweed. Cover.
3. Fifteen minutes later, add the lobster and more seaweed. Cover.
4. About eight minutes later add the corn.
5. Ten minutes later add the clams. Cover and steam until clams open.