Preheat the oven to 350℉ and lightly grease a 12-cup mini muffin pan.
In a mixing bowl, combine the flour and salt. Add the cold butter and work it in using a pastry cutter or your fingertips until the mixture resembles coarse crumbs.
Add the ice-cold water one tablespoon at a time, mixing just until the dough comes together. Do not overwork.
Roll the dough out on a lightly floured surface and cut small circles sized to fit the mini muffin cups. Press the dough into the pan and prick the bottoms lightly with a fork. Place the prepared crusts in the refrigerator while you prepare the filling.
In a separate bowl, whisk together the eggs, heavy cream, salt, and pepper until smooth and well combined.
Divide the chopped smoked salmon and grated cheese evenly among the chilled crusts. Pour the egg mixture over the filling, filling each cup almost to the top.
Bake for 15 to 20 minutes, or until the centers are set and the tops are lightly golden. Let the quiches cool in the pan for 5 minutes, then carefully remove. Garnish with chopped dill before serving.