Red Onion Tri-Mushroom Quiche

READY IN: 2hrs 25mins




  • Sift flour and salt into a bowl.
  • Add the butter and cut it into the flour until mixture resembles breadcrumbs.
  • Beat the egg yolk with the water in small bowl.
  • Sprinkle liquid onto flour mixture and combine with your fingertips.
  • Form dough into a ball.
  • Cover and chill for 30 minutes.
  • Preheat the oven to 375 degrees and grease pie or quiche pan with butter.
  • Roll out dough on floured surface and then line the pan.
  • Prick bottom with fork and chill for 30 minutes.
  • Line with foil and dried beans and bake in the oven for 25 minutes.
  • Remove the foil and beans and cool on a wire rack.
  • Reduce oven temp to 350 degrees.
  • Melt butter in a large, heavy bottomed skillet.
  • Add the onions, cover and cook over very low heat, stirring occasionally, for 20 minutes.
  • Add mushrooms and thyme and cook for an additional 10 minutes, stir often.
  • Spoon mixture into cooled tart shell and place the pan on a cookie sheet.
  • Lightly beat the egg with the egg yolks and cream ans season to taste with salt and pepper.
  • Pour mixture over mushroom filling and bake for 20 minutes or until the filling is set and golden.
  • Serve hot or at room temperature.