Preheat your oven to 400°F. Gather all of your ingredients on a large, clean workspace.
Cut your pastry sheets in half lengthwise, so that you have 4 rectangles of pastry, each about twice the size of a salmon fillet.
On one side of a piece of pastry, place 3-4 slices of potato. Place a fillet of salmon on top of the potatoes. Season the salmon with salt and pepper. Spread about a quarter cup of creamed chard on top of the salmon fillet.
- Brush a thin layer of beaten egg all around the edge of the
pastry, then fold the empty half of the pastry over the stack of potato,
salmon, and chard. Use a fork to seal the pastry all around the edges. Repeat
with the remaining pastry and salmon fillets.