Instructions
FOR THE CRUST:
Preheat the oven to 350. Generously butter and flour a 9-inch fluted tart pan with a removable bottom and refrigerate it while the oven preheats.

Remove the tart pan from the refrigerator. Use your fingertips to press the chilled dough evenly over the bottom and up the sides of the pan. Trim off any excess dough.

Bake the crust for 10 to 15 minutes, then rotate the shell and continue baking for another 10 to 15 minutes, or until the shell is golden brown. Remove the shell from the oven and let it cool whil you make the filling. There may be some cracks in the shell; they will not affect the tart.

FOR THE LEMON SABAYON:
Bring about 1 1/2 inches of water to a boil in a pot that is slightly smaller than the diameter of the mixing bowl you will be using for the sabayon. Meanwhile, in a large metal bowl, whisk the eggs, yolks, and sugar for about 1 minute, or until the mixture is smooth.

Set the bowl over the pot and, using a large whisk, whip the mixture while you turn the bowl, for even heating. After about 2 minutes, when the eggs are foamy and have thickened, add one third of the lemon juice. Continue to whisk vigorously and when the mixture thickens again, add another one third of the lemon juice. Whisk until the mixture thickens again, then add the remaining lemon juice. Continue whisking vigorously, still turning the bowl, until the mixture is thickened, light in color, and the whisk leaves a trail in the bottom of the bowl. The total cooking time should be approximately 8 to 10 minutes.

Turn off the heat but leave the bowl over the water as you add the butter. Whisk in the butter one piece at a time. The sabayon may loosen slightly, but it will thicken and set as it cools. Pour the warm sabayon into the cooled tart shell and place the pan on a baking sheet.

Preheat the broiler. While the sabayon is still warm, place the tart under the broiler. Leaving the door open, brown the top of the sabayon, rotating the tart if necessary for even color; do not leave the oven -- this browning will happen in a few seconds. Remove the tart from the broiler and let it sit at least 1 hour before serving. Serve at room temperature or cold.

FOR THE HONEYED MASCARPONE CREAM:
In a bowl set over ice, whip the cream until it is frothy. Add the mascarpone and honey and continue to whisk for about 2 minutes, or until the cream is thick and creamy. Keep refrigerated until serving.

TO COMPLETE:
Serve the slices of the tart with the mascarpone cream on the side.

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Yields: 8 Servings
     French Laundry Cookbook, Thomas Keller, page 294

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