Makes one 9-by-13-inch tart
Opulence is the theme of the day with this decadent combination of smoked salmon, tarragon and heavy cream.
Dufour brand puff pastry is usually available in the freezer cases at Whole Foods Markets; it's made with butter and will taste better in this recipe.
Make ahead: The rolled-out puff pastry needs to be refrigerated for 30 minutes. It's best to make the tart the same day it is served; leftovers can be wrapped and refrigerated overnight. From French-trained Southern cookbook author and cooking instructor Virginia Willis.
Flour, for the work surface
14 ounces frozen puff pastry dough, preferably Dufour brand, slightly defrosted (see note above)
1 tablespoon unsalted butter
1 teaspoon canola oil
3 leeks, white and light-green parts, rinsed well, cut in half lengthwise and then cut crosswise into very thin half-moons
Freshly ground black pepper
3 large eggs
1 tablespoon water
1/2 cup heavy cream
Pinch freshly grated nutmeg
1 tablespoon chopped fresh tarragon
8 ounces best-quality smoked salmon, chopped
Line a 9-by-13-inch rimmed baking sheet with parchment paper, allowing for a few inches of overhang so you can use it to remove the tart after baking.
Lightly flour a work surface. Roll out the puff pastry dough to about a 10-by-14-inch-inch rectangle. Drape the dough over the rolling pin and transfer it to the lined baking sheet. The extra width and length of dough will form the short sides of the tart. Use the tines of a fork to prick the bottom surface of the dough. Refrigerate until firm, about 30 minutes.
Meanwhile, heat the butter and oil in a large skillet over medium heat. Add the leeks and stir to coat; season with salt and pepper to taste. Reduce the heat to low. Cook, stirring occasionally, until the leeks are meltingly soft and tender, about 20 minutes. Remove from the heat; cover loosely to keep warm.
Preheat the oven to 400 degrees.
Whisk together one of the eggs with the water in a small bowl; brush the mixture over the chilled puff pastry dough. Bake for 12 to 15 minutes, until pale golden, then remove from the oven. If it has risen, use an offset spatula or a clean kitchen towel to press down the pastry.
Beat the remaining 2 eggs, heavy cream, nutmeg and tarragon in a medium bowl until smooth; season with pepper to taste. (Do not use salt, because the salmon can be salty.) Spread the salmon and leeks evenly over the still-warm crust, then pour in the egg-cream mixture, making sure it is evenly distributed. Return to the oven and bake for 20 minutes or until the filling is set.
Transfer the tart to a wire rack (on the parchment paper) to cool for 10 minutes, then use a serrated knife to slice it. Serve immediately.
Per serving: 240 calories, 7 g protein, 13 g carbohydrates, 18 g fat, 10 g saturated fat, 100 mg cholesterol, 290 mg sodium, 0 g dietary fiber, 0 g sugar.