It sounds good. How do you make it? (Or if it's involved, can you link to a recipe online?)
Brown the mince in a bit of butter.
Then add chopped onion and chopped mushrooms. Fry for 3-4 minutes.
Let it cool a bit. Add half a spoon of flour to thicken everything a bit.
Then I usually use shortcrust pastry that I bought. Half the sheet and then half it again, making 4 squares of pastry.
Put mixture on top, close pastry with the help of egg. Then coat the whole thing with egg and into the oven for 20 minutes. (Approximately 400F, preheated)
I sometimes add a chilli pepper to the mince meat to add some heat.