Pumpkin Roll Cake

INGREDIENTS

• 1 teaspoon unflavored gelatin
• Powdered sugar
• 2/3 cup canned pumpkin, packed
• 1 1/2 teaspoons ground cinnamon
• 1 1/4 teaspoons ground ginger
• 3/4 cup cake flour
• 3 tablespoons powdered sugar
• 1 cup whipping cream, chilled
• 2 tablespoons dark rum
• 1 1/2 cups purchased caramel sauce, warmed, for garnish
• 1/3 cup granulated sugar
• 6 large eggs, separated
• 3/4 teaspoon ground allspice
• 6 tablespoons plus 1/2 cup English toffee pieces for garnish
• 1/3 cup golden brown sugar, packed
• Additional powdered sugar, for garnish
• 1/8 teaspoon salt