Start by preheating the oven to 200 degrees Celsius. Using a small serrated knife, cut down the sides of the corn cobs to release the kernels. Next, heat oil in a large saucepan over medium-high heat. Cook the leek and bacon, stirring, for five minutes or until the leek softens.
Add the potato, corn and celery. Cook, stirring, for two minutes or until just heated through. Add the butter and cook for one minute or until the butter melts. Sprinkle over the flour and cook, stirring, for one to two minutes or until well combined. Add the milk and cook, stirring constantly, for three to four minutes or until the sauce boils and thickens.
Set aside for 15 minutes to cool slightly. Stir in the salmon, cod, chives, dill and cream and season with salt and pepper. Spoon the mixture into an ovenproof dish. Place the pastry sheets on a clean work surface and lightly brush with egg. Using a five centimetre round pastry cutter, cut discs from the pastry.
Arrange the discs over the salmon mixture and brush with the remaining egg. Sprinkle with salt. Pop in the oven and bake for 25 to 30 minutes or until the pastry is puffed and golden. Sprinkle with dill sprigs and serve with lemon wedges. This golden seafood chowder pie makes a mouth-watering main for your next get together.