Tarte Fine à l'Oignon et Chèvre
Tarte Fine à l'Oignon et Chèvre·(tart feen ah loh-nyon ay shev-ruh)
Chapter 1 — Apéro & Hors d'Œuvres
If you have ever sat at the pewter bar at Balthazar or Pastis, sipping a crisp Sancerre while waiting for your steak frites, you know this tart. It is the quintessential French bistro appetizer: sweet, deeply savory, and uncompromisingly rich. A true tarte fine is defined by its crust, which must be impossibly thin and shatteringly crisp, achieved here by blind-baking puff pastry trapped under the weight of a heavy steel pan. Equally important are the onions. Do not trust any recipe that tells you onions can caramelize in fifteen minutes. To hit true brasserie depth, you must surrender to the process, standing by your cast iron skillet for over an hour. Finished with a stabilized goat cheese emulsion that bakes into a luxurious custard, this is exactly how the professionals do it.
Before you start
Thaw the puff pastry.
Move your all-butter puff pastry from the freezer to the refrigerator the night before baking so it is pliable but remains entirely chilled.
Bring the cheeses to room temperature.
Pull the goat cheese and cream cheese from the fridge at least an hour before blending to ensure they incorporate into a completely smooth emulsion.
Work ahead.
The onions can be caramelized up to three days in advance, and the cheese emulsion mixed two days ahead. Assembly takes just minutes when you are ready to bake.
Ingredients
- yellow onions3 large
- extra virgin olive oil2 tbsp
- unsalted European cultured butter2 tbsp
- fresh thyme sprig1 large
- bay leaf1 small
- kosher salt1/2 tsp
- freshly ground black pepper1/2 tsp
- Champagne vinegar1 tbsp
- all butter puff pastry14 oz
- fresh goat cheese8 oz
- cream cheese4 oz
- egg1 large
- egg yolk1 large
- freshly grated nutmeg1/8 tsp
- kosher salt1/4 tsp
- freshly ground black pepper1/4 tsp
Method
- 01
Initiate the caramelization in a heavy skillet.
Set a large cast iron skillet or Dutch oven over medium-low heat and melt the olive oil and cultured butter. Once the butter is foaming, add the sliced onions, thyme sprig, bay leaf, 1/2 teaspoon of salt, and 1/2 teaspoon of pepper, tossing to coat the onions evenly in the fat.
- 02
Cook the onions low and slow for at least an hour.
Allow the onions to cook slowly, stirring every 5 to 10 minutes to extract moisture without scorching them. After about 45 minutes they will be soft and blonde; continue cooking for another 15 to 45 minutes until they reduce in volume by nearly 75 percent, turning a deep mahogany color and smelling intoxicatingly sweet.
- 03
Deglaze the pan and cool the onions.
Remove the skillet from the heat, discard the thyme and bay leaf, and stir in the Champagne vinegar, scraping up any fond from the bottom of the pan to balance the sweetness. Transfer the onions to a bowl and allow them to cool completely.
- 04
Prepare the puff pastry for a double-pan blind bake.
Preheat the oven to 375°F (190°C). Roll the thawed puff pastry on a lightly floured surface to 1/8-inch thickness, trim into a 10-inch circle, and place it on a parchment-lined, heavy-duty baking sheet. Prick the dough all over with a fork to release steam.
- 05
Compress the pastry and bake.
Place a second sheet of parchment directly on top of the dough, followed by a second heavy baking sheet to physically weigh the dough down. Bake for 15 minutes, then remove the top pan and parchment; if it is still raw, bake uncovered for 3 to 5 minutes until pale, flat, and cooked through, then remove and lower the oven to 350°F (175°C).
- 06
Blend the cheese emulsion.
While the crust cools, combine the room-temperature goat cheese, cream cheese, egg, egg yolk, nutmeg, 1/4 teaspoon salt, and 1/4 teaspoon pepper in a food processor, processing for 30 to 45 seconds until completely smooth, silky, and devoid of lumps.
- 07
Assemble and bake the tart.
Spread the cooled, caramelized onions in an even, dense layer over the pre-baked crust, leaving a 1/4-inch border. Carefully dollop and spread the goat cheese emulsion over the onions, then bake for 15 to 20 minutes until the cheese is set, slightly puffed, and turning golden brown at the edges.
- 08
Cool slightly before serving.
Transfer the tart to a wire rack to cool for at least 10 minutes before slicing. Garnish with fresh thyme leaves and serve warm or at room temperature, ideally alongside a sharp salad of bitter greens dressed in a simple Dijon vinaigrette.
Notes
Respect the onion timeline.
True caramelization is the pyrolysis of natural sugars and cannot be rushed. Bumping the heat will only scorch the alliums, yielding bitter results rather than brasserie depth.
The secret to the emulsion.
Goat cheese has a low moisture content and can separate or turn grainy under direct oven heat. Blending it with higher-fat cream cheese and egg yolks creates a stable, luxurious custard that remains incredibly smooth when baked.
Sourcing your butter.
European cultured butter clocks in at 83 percent butterfat compared to the American standard of 80 percent. In puff pastry, less water means less unwanted steam, yielding a vastly superior shatter and a distinct, nutty tang.