Chop the plum and rhubarb. In a medium bowl, mix the fruit together with sugar, cornstarch, and lemon zest. Allow the mixture to sit for 10 minutes.
Preheat oven to 190C/ 375F/ Gas mark 5.
Divide the dough into two and wrap each ball in clingfilm, and chill in the fridge until ready to use.
For the pastry: Rub together the flour and butter on the countertop. Add the sugar, followed by the eggs. And then add enough milk to work the mixture into a dough.
My favourite food in the whole wide world is toasted buttered bread and sometimes I eat it for every meal of the day. My second favourite food is cheese. I'm left handed and have to use two spatulas to flip pancakes...