Pumpkin Mousse Parfaits

Name: Pumpkin Mousse Parfaits
Ingredients: 1 envelope unflavored gelatin; ¼ c. dark rum; 1 can solid-packed pumpkin; ½ c. granulated sugar; ½ c. light brown sugar; 2 extra-large egg yolks; 2 tsp. finely grated orange peel; ½ tsp. ground cinnamon; ¼ tsp. ground nutmeg; ½ tsp. Kosher salt; 1½ c. cold heavy cream; 1½ tsp. pure vanilla extract; 1 c. cold heavy cream; 1 tbsp. granulated sugar; 1 tsp. pure vanilla extract; 3½ c. chopped store-bought gingersnap cookies; 3 tbsp. dry crystallized ginger (optional)