I'm not sure where the "French" comes in to play, but perhaps it's describing the texture. The chocolate filling is so silky smooth, light and delicious...any chocoholic will fall in love with it. And don't get me started on the crust!
1 cup heavy cream, chilled
3 large eggs
3/4 cup granulated sugar
2 tablespoons water
8 ounces bittersweet chocolate, melted and cooled
1 tablespoon vanilla extract
8 tablespoons unsalted butter, cut in to 1/2" cubes and softened
1 pie shell (9-inch), baked and cooled (see recipe below)
With electric mixer on medium-high speed, whip cream to stiff peaks, 2 to 3 minutes. Transfer whipped cream to small bowl and refrigerate.
Combine eggs, sugar, and water in large heatproof bowl set over medium saucepan filled with ½ inch barely simmering water (don’t let bowl touch water). With electric mixer on medium speed, beat until egg mixture is thickened and registers 160 degrees, 7 to 10 minutes. Remove bowl from heat and continue to beat egg mixture until fluffy and cooled to room temperature, about 8 minutes.
Add chocolate and vanilla to cool egg mixture and beat until incorporated. Beat in butter, a few pieces at a time, until well combined. Using spatula, fold in whipped cream until no streaks of white remain. Scrape filling into pie shell and refrigerate until set, at least 3 hours and up to 24 hours. Serve with lightly sweetned whipped cream and chocolate shavings.
Foolproof Single Pie Crust
1 1/4 cups (6 ounces) all-purpose flour
1/2 teaspoon salt
1 tablespoon sugar
6 tablespoons cold unsalted butter, cut in to 6 pieces
1/4 cup vegetable shortening, chilled and cut in to 2 pieces
2 tablespoons cold vodka
2 tablespoons cold water
Process 3/4 cups flour, salt, and sugar together in food processor until combined, about 2 one-second pulses. Add butter and shortening and process until homogenous dough just starts to collect in uneven clumps, about 10 seconds (dough will resemble cottage cheese curds with some very small pieces of butter remaining, but there should be no uncoated flour). Scrape down sides and bottom of bowl with rubber spatula and redistribute dough evenly around processor blade. Add remaining 1/2 cup flour and pulse until mixture is evenly distributed around bowl and mass of dough has been broken up, 4 to 6 quick pulses. Empty mixture into medium bowl.
Sprinkle vodka and water over mixture. With rubber spatula, use folding motion to mix, pressing down on dough until dough is slightly tacky and sticks together. Flatten dough into 4-inch disk. Wrap in plastic wrap and refrigerate at least 45 minutes or up to 2 days.
Adjust oven rack to lowest position, place rimmed baking sheet on oven rack, and heat oven to 425 degrees. Remove dough from refrigerator and roll out on generously floured (up to ¼ cup) work surface to 12-inch circle about 1/8 inch thick. Roll dough loosely around rolling pin and unroll into pie plate, leaving at least 1-inch overhang on each side. Working around circumference, ease dough into plate by gently lifting edge of dough with one hand while pressing into plate bottom with other hand. Leave overhanging dough in place; refrigerate until dough is firm, about 30 minutes.
Trim overhang to ½ inch beyond lip of pie plate. Fold overhang under itself; folded edge should be flush with edge of pie plate. Flute dough or press the tines of a fork against dough to flatten it against rim of pie plate. Refrigerate dough-lined plate until firm, about 15 minutes.
Remove pie pan from refrigerator, line crust with foil, and fill with pie weights or pennies. Bake for 15 minutes. Remove foil and weights, rotate plate, and bake for 5 to 10 minutes additional minutes until crust is golden brown and crisp.