Make the Dough: In a large salad bowl, pour the flour, add the butter cut into small cubes, and the cold water. Knead quickly to form a ball, wrap it in plastic, and refrigerate for 1 hour.
Prepare the Filling: In another bowl, beat the eggs and mix in the milk, powdered milk, salt, and pepper. Chop the parsley and fold it into this mixture.
Add the Salmon: Cut the smoked salmon into thin strips. Using a vegetable peeler, make parmesan shavings.
Roll Out the Dough: After chilling the dough, roll it out on a floured surface. Fold it once, then a second time, and roll it out again.
Assemble the Tart: Oil a pie dish and place the rolled-out dough in it, pricking the bottom with a fork. Layer the salmon strips and parmesan shavings evenly over the dough. Pour the egg mixture on top.
Bake to Perfection: Preheat your oven to 230°C (450°F). Bake the tart for 20 minutes, then lower the temperature to 180°C (350°F) and cook for an additional 10 minutes.