Smoky Bacon, Flat Mushroom and Chive Quiche

Shortcrust Pastry:

110g plain white flour

pinch of salt

50g butter

1 egg, preferably free-range and a few drops of water to bind, 2-3 tablespoons of liquid approx.

Filling:

110g rindless streaky rashers (slightly smoked if available)

1 tbsp olive or sunflower oil

110g chopped onion

1 tbsp olive oil

110g sliced mushrooms

salt and freshly ground black pepper

2 large eggs + 1 egg yolk, preferably free-range

300ml cream or 175ml cream and 110ml milk

1 tbsp chopped chives

75g freshly grated Hafod or other aged Cheddar cheese

salt and freshly ground pepper

flan ring or deep quiche tin, 19cm diameter x 3cm high