Cassata Alla Siciliana Sicilian Cream Tart

Name: Cassata Alla Siciliana (Sicilian Cream Tart)
Ingredients: 1 1/2 tablespoons orange zest; 1/2 cup confectioners' sugar; 1/2 teaspoon salt; 2 egg whites; 1/2 teaspoon ground cinnamon; 1/2 cup chopped toasted almonds; 1 1/2 pounds ricotta cheese; 1/2 cup white sugar; 1/4 cup confectioners' sugar for dusting; 6 eggs; 1 cup cake flour; 2 (1 ounce) squares sweet chocolate, grated; 6 tablespoons rum; 1/4 cup rum; 1 teaspoon almond extract; 1/4 cup candied cherries, chopped; 1/4 cup butter; 1 1/2 tablespoons lemon juice; 2 1/2 cups confectioners' sugar; 2 tablespoons sherry