Chocolate Hazelnut Tart Scented With Orange

Ingredients

• 1/3 cup (about 1 1/4 ounces) hazelnut pieces
• 3 tablespoons sugar
• 1 cup all-purpose flour (spoon flour into dry-measure cup and level off)
• 1/2 teaspoon baking powder
• 1/4 teaspoon salt
• 4 tablespoons (1/2 stick) unsalted butter, cold, cut into 6 pieces
• 1 large egg
• 3/4 cup heavy whipping cream
• 1/4 cup sugar
• 6 tablespoons (3/4 stick) unsalted butter, cut into 6 pieces
• 6 ounces bittersweet (not unsweetened) chocolate cut into 1/4-inch pieces
• 2 large eggs
• 1 tablespoon finely grated orange zest
• 1 tablespoon dark rum
• 1/2 cup (about 2 ounces) hazelnut pieces, coarsely chopped
• 2 ounces bittersweet chocolate melted with 1 tablespoon butter
• one 10-inch fluted tart pan with removable bottom