3  tablespoons butter or margarine 1/2 cup diced celery 1/4 cup minced onion 31/4 cups chicken broth (dissolve 4 chicken bouillon cubes in 31/4 cups boiling water) 5  cups coarse whole wheat bread crumbs; reserve 1/2 cup crumbs for topping 1/4 cup snipped parsley 1/2 teaspoon salt 1/4 teaspoon ground black pepper 1  egg, slightly [...]