At a glance
You're making a mushroom quiche from scratch with a homemade butter pastry that needs chilling and blind-baking – though store-bought pastry works too if you're short on time. The real magic happens with sautéed mushrooms, bacon, and a creamy egg custard that comes together quickly before baking, so you're looking at about 3 hours total from start to slicing.
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Chill the butter
Cut the butter into small pieces and place it in the freezer for at least 15 minutes to get really cold – you can even leave it there for up to an hour. Once well chilled, put it into a food processor fitted with the blade attachment.
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Bring it together into a dough
Add the flour, sugar and salt, then pulse a few times until the mixture looks like coarse flour with small beads of butter running through it. Gradually add water, a little at a time, until the mixture comes together into a dough.
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Tip:
You should still be able to see small pieces of butter in the dough – don't try to work them in completely. It's exactly these little butter pieces that give the pastry its wonderfully flaky, crisp texture.