In New England and down the Eastern Seaboard, summer is the time for clambakes. This dramatic, festive cookout is a perfect way to celebrate Independence Day. The concept is simple—dig a pit on the beach, build a slow fire, and bury layers of food and seaweed. Part of the fun is deciding what food to use. Clams are of course traditional, but also consider mussels, crabs, and lobsters, plus corn and potatoes.