Place the minced meat, garlic, and spices in a lightly oiled pan or skillet and let them cook for 8-10 minutes.
Add in the mushrooms, tomato sauce and parsley and cook an additional minute.
With a large spatula, mix everything around a bit for another minute or two.
Preheat the oven to 375°F (190°C) for 5 minutes.
Lightly grease a large casserole dish that can go in the oven.
Roll out the pie base in the casserole dish.
Gently spoon the beef minch filling on the bottom layer of the pie dough crust.
Once all the the beef filling is in, top with the 2nd pie crust.
Crimp the edges of the two pie crusts together all the way around with your fingers.
In a small bowl, mix the egg white and baste the top of the pie lightly with a pastry brush. Slice small slits on the top of the chicken pie.
Place in the oven for 45-50 minutes until the top has risen and is golden brown.
Serve while warm.