Preheat the oven to 200C/400F degrees
Place all the dry ingredients in a bowl and blend well.
Add the oil and egg and stir until combined.
Add the boiling water, gradually until you have a dough. Firm up with your hands.
Roll out the dough by placing it on a piece of parchment paper, place another piece of parchment paper on top, then roll out.
Cut out 4 large circles (I used a small saucepan lid).
Place the circles on top of a parchment paper lined baking tin.
Spoon the filling ingredients over half the circles.
Fold half of the dough over the filling to make half circles and press down the edges. I used a fork for a pattern and to firm the edges.
Brush the tops of the dough with the beaten egg.
Bake for 30-35 minutes.