This recipe is Ina's delicious, inventive take on the flavors of a traditional pumpkin pie. Also try these other delicious pumpkin dessert recipes! Prepare mousse: In small heatproof metal bowl, sprinkle gelatin over rum. Let stand 10 minutes to soften gelatin. In large bowl, whisk pumpkin, sugars, egg yolks, orange peel, cinnamon, nutmeg, and salt until well combined.