Easy

Keep in mind: 1 pound fresh mushrooms = 1 quart; 1/2 pound sliced fresh mushrooms = 2 1/2 cups; 1/2 pound diced fresh mushrooms = 2 cups; 3/4 pound (3 cups) sliced or quartered fresh mushrooms = 2 cups sautéed mushrooms

Traditional chowders all start off with a hearty soup base of onions and potatoes, and that makes a good soup just by itself. To this fragrant base you then add chunks of fish, or clams, or corn, or whatever else seems appropriate.