Pre-heat the oven to 180°C (350°F) and take the dough out of the fridge;
Divide the dough in two pieces, one larger than the other (⅔ + ⅓);
Roll out the larger piece of dough on a clean surface until you get a big disc; the disc should be 3 cm larger than the tart tin;
Set the dough disc into the tin and then trim away any excess; to make it easier, you can roll the dough on the rolling pin and unroll it into the tart tin;
Prick the dough with the tins of a fork to help release the steam while baking;
Blind bake the dough for about 10-12 minutes at 180°C (350°F);
Roll out the remaining dough into a rectangle;
Cut the dough into 1,5 - 2 cm strips;
Carefully mix the filling ingredients;
Take the tin out of the oven and the plum filling on top of the crust;
Arrange and weave the dough strips in a lattice pattern on top of the pie;
Bake for approximately 40 minutes at 180°C (350°F), until the lattice pastry on top turn golden brown;
Remove the pie from the oven and leave to set for 3 hours before serving.