Button Mushroom and Goat Cheese Pastry

👨‍🍳 Method

For the Wrapping Dough

1. 1
   Mix the flour and salt in a bowl.

   Bowl
2. 2
   Transfer to a food processor, add the cold butter in cubes and process until coarse crumbs form.

   Food processor
3. 3
   Add the egg and cold water and quickly bring together with your hands, without kneading, just until the dough comes together.

   💡Knead as little as possible: long kneading develops gluten, and the dough comes out tough and shrinks in the oven.
4. 4
   Wrap in plastic wrap and chill at least 30 minutes.

   ⚙ Wrapping and Chilling the DoughPlastic wrapRefrigerator

   💡Chilling firms the butter and relaxes the gluten: the dough rolls out easily, doesn't stick to the counter and doesn't shrink in the oven.

For the Fried onion

1. 5
   Heat the olive oil in a pan over medium heat.

   ⚙ Pan-fryingStoveFrying pan
2. 6
   Add the onion and fry 5–8 minutes, stirring now and then, until the onion is soft and translucent and starts to turn golden at the edges. If it browns too fast, lower the heat.

   ⚙ Adding to the hot fat and fryingStove

   💡Add by cooking time: what needs long (onion, carrot, meat) goes in first, and what burns fast (garlic, dry spices) goes in last, only until fragrant.
3. 7
   Add the garlic and fry about 30 seconds to 1 minute, just until fragrant. Don't let the garlic brown.

   ⚙ Adding to the hot fat and fryingStove

   💡Garlic burns quickly and turns bitter. Add it only after the onion has softened, over medium heat, and add the next ingredient as soon as it smells fragrant.

To assemble

1. 8
   Preheat the oven to 180°C (355°F).

   ⚙ Preheating the OvenOven

   💡Put things in the oven only once it's reached temperature, after the heating light has gone off: an oven that hasn't reached temperature changes baking times, and the bake burns outside or stays underbaked.
2. 9
   Add the mushrooms and thyme and fry another 5 minutes, until their liquid evaporates.

   ⚙ Adding to the hot fat and fryingStove

   💡Chicken and mushrooms go into the filling already fried: the mushrooms release their water in the pan and not in the crust.
3. 10
   Beat the eggs and cream with the salt and black pepper.

   BowlWhisk
4. 11
   Roll out the dough and line Pie pan with it.

   ⚙ Rolling Out DoughRolling pin

   💡Roll from the center outward and give the dough a quarter turn between rolls: this keeps it even in thickness and stops it sticking to the counter. If it springs back, cover for 10–15 minutes and try again.
5. 12
   Cover the dough with parchment paper and fill with pie weights.

   Parchment paperPie weights
6. 13
   Bake the crust on its own at 180°C (355°F) 15 minutes, until it is lightly golden. Remove the paper and the weights.

   ⚙ BakingOvenRound pan

   💡Check by the cue (until…), not just the clock: every oven bakes a little differently.
7. 14
   Scatter the mushrooms, cheese and onion over the crust and pour the egg mixture on top.
8. 15
   Bake at 180°C (355°F) 30–35 minutes, until the filling is set and golden.

   ⚙ BakingOvenRound pan
9. 16
   Serve hot.