Pecan and Chocolate Tart with Bourbon Whipped Crème Fraîche

Name: Pecan and Chocolate Tart with Bourbon Whipped Crème Fraîche
Ingredients: 1 Pâte Sucrée disk (click for recipe); All-purpose flour (for dusting); 1 1/2 cups chopped pecans plus 1 1/2–2 cups pecan halves; 1 /4 cup (1/2 stick) unsalted butter; 1 /2 vanilla bean, split lengthwise; 1 cup sugar; 1 /2 cup dark corn syrup; 1 /2 cup light corn syrup; 1 /4 teaspoon kosher salt; 3 large eggs; 4 ounces semisweet or bittersweet chocolate, chopped; 3 /4 cup heavy cream; 1 /4 cup crème fraîche; 2 teaspoons bourbon