Ingredients
Instructions
- Preheat oven to 400 degrees.
- For the crust: In a food processor, combine the flour, sugar and salt in the bowl and pulse to blend. Add the butter and pulse. Add the water a little at a time and pulse until the dough just begins to come together in a rough mass.
- Transfer the dough to a floured work surface and roll into a 13-inch disk, about 1/4″ thick. Fold over the edges of the dough, about 1″ around, and crimp to seal. Transfer to baking sheet and refrigerate until ready to use.
- For the filling: Melt butter in a large skillet over medium heat. Add salt and combine, then add onions. Cook for 15-20 minutes, stirring frquently, until carmelized on all sides.
- Add the wine and reduce until syrupy, about 6-8 minutes.
- Transfer the pan to the oven and roast for 10 minutes.
- Remove the pan from the oven and place the refrigerated dough on top of the onions. Prick the surface to let air escape.
- Return the pan to the oven and bake until crust is golden brown, about 35 minutes.
- Remove the pan from the oven and let stand for 5 minutes.
- Place a serving platter upside down on top of the pan and turn both upside down together. Lift off the pan, leaving the onion tart on the serving dish. Serve immediately!