Chocolate Tart - Once Upon a Chef

Ingredients

• 1 stick (½ cup) unsalted butter, at room temperature
• ¼ cup + 2 tablespoons sugar
• ¼ teaspoon salt
• 1¼ cups all-purpose flour, spooned into measuring cup and leveled-off
• 1 large egg yolk
• 8 ounces semisweet chocolate, best quality such as Ghiradelli or Guittard, chopped or broken into small pieces
• 1¼ cups heavy cream
• 2 tablespoons sugar
• 2 large eggs, at room temperature
• 1 teaspoon vanilla extract
• 3 tablespoons heavy cream
• 1 tablespoon light corn syrup
• 2 ounces semisweet chocolate, best quality such as Ghiradelli or Guittard, chopped or broken into small pieces
• 1 tablespoon hot water