Watermelon Bombe

For many years, special summer occasions called for one cake and one cake only: the watermelon roll. Composed not of cake but of ice cream, it was something that came from one well-known restaurant, and was impossible to replicate at home . . . or so I thought. Many years later, I was determined to revive this childhood favorite, and in doing so, discovered that it was far superior to that chemical- and artificial color-laden original. It’s still only for special occasions, since it takes q