01 - Preheat the oven to 350°F. Grease a 9-inch tart pan with a removable bottom.
02 - Combine flour, sugar, and salt. Rub in cold butter with fingertips until coarse crumbs form. Stir in egg yolk and just enough ice-cold water to bring dough together.
03 - Press dough evenly into the tart pan and prick the base with a fork. Chill in the refrigerator for 15 minutes.
04 - Blind bake the crust for 15 minutes. Remove weights and bake an additional 8 minutes until lightly golden. Allow to cool slightly.
05 - Melt butter in a skillet over medium heat. Add pears, brown sugar, cinnamon, and lemon juice. Sauté for 5 to 7 minutes until pears are tender. Cool slightly.
06 - Heat heavy cream in a saucepan until just simmering. Remove from heat, add chopped chocolate and butter, stirring until smooth.
07 - Spread ganache evenly over the cooled crust. Arrange warm pears on top attractively.
08 - Return tart to the oven for 8 to 10 minutes to warm through. Serve slightly warm.