You can freeze the vol-au-vents either cooked or uncooked. To freeze uncooked vol-au-vents - assemble the vol-au-vents and then freeze them on the baking sheet until they are hard. Transfer to a plastic bag and store in the freezer until you are ready to use them. To use, place the frozen vol-au-vents on a parchment-lined baking tray and let them defrost. Bake as per recipe instructions To freeze cooked vol-au-vents - place the cooked vol-au-vents in a rigid container and place them in the freezer. To use, remove from the freezer and allow to defrost. Then place in a hot oven for a few minutes to warm and crisp. Fill the warm vol-au-vents with your favourite filling.