Pesto Pastie

Had some pastry left over from the steak pie and so made a proper fusion of street food - Cornwall meets Rome - mushroom, cheese, and red pesto (with optional bacon/ham) pastie.
Okay what you do is roll out an oval piece of short crust pastry (or puff - whatever you have) and spread a decent teaspoon of red pesto, like a mini pizza. Fry some mushrooms and bacon or ham up in a pan with some butter for 3 mins and then wack on top of the pesto. sprinkle with cheese, salt+pepper and pull up the pastry around the edges, making it into a pastie-like shape. Brush pastry join with milk and then stick in the oven for 20 mins at 160. Makes a change from the usual!