For dietary restrictions, omit puff pastry and use a gluten-free pie crust or vegan puff pastry instead. The pumpkin puree and caramelized onions can be prepared up to 3 days in advance and stored in the refrigerator until ready to assemble. Assembled unbaked pockets can be frozen for up to 1 month. Allow to thaw in the refrigerator overnight before baking. For a crowd, double or triple the recipe and bake in batches. Pockets are also ideal for party appetizers. Top with whipped cream, crème fraiche or vanilla yogurt for a decadent treat.