preheat the oven to 200° Celsius

cut up the bacon and fry in a dry pan until the fat has rendered down

remove from the pan and set aside while you pan fry the flesh side of the mushrooms

season the exposed side, add the cut up bacon and the gorgonzola

bake in the oven for 5 minutes

then put under the grill for a further 5 minutes

top each mushroom with a teaspoon of the pesto