Line the base of a 9" pie tin with pastry. Stab with a fork, line with foil and fill with baking stones. Bake for 10 minutes. Remove stones and foil and return to oven- bake until golden.
In the meantime- fry onion and capsicum until soft.
Add garlic and fry for two minutes. Add mince and fry until browned through, making sure to chop it up good (plastic egg flip breaks it up nicely).
Stir in the sauce, crumb, salt, pepper and oregano. Remove from heat.
In a small bowl throw your milk and egg and whisk together. Stir in mustard, salt and cheese. Set aside.
Spoon mince into pastry, top with cheese mix.
Cover with a layer of pastry and press down edges with a fork.
Cut a couple of slits in the top of the pie and bake for 15 to20 minutes. For a nice golden crust, brush pastry with milk or butter before baking. Serve with creamy mash and peas.