In a bowl of a food processor, process the butter and sugar until smooth.
Add the vanilla extract and egg and process to blend.
Add the flour and process until you have a smooth dough.
Press the dough into s disc, wrap it in plastic wrap, and refrigerate for a minimum of 30 minutes.
Almond Frangipane
Place all of the ingredients in a large bowl and use a wooden spoon or a whisk to blend all of the ingredients together.
Poached Pears
In a medium-large saucepan, place the water, sugar, lemon juice, and lemon rind and bring to a simmer.
Peel, core, and slice in half the pears. Add them to the simmering water and cook for 10-15 minutes. Remove from the water and place over a plate to cool.
Slice the pears halves into 1/4-inch slices.
Blind Bake The Crust
Remove the crust dough from the refrigerator and roll it between two pieces of parchment paper into a 10-inch circle.
Remove the top paper, and use the bottom paper to press the dough into the tart shell.
Set your oven to 375F (190C) and place the crust in the refrigerator while the oven is warming.
Gently peel the top parchment paper,trim the edges, and use a fork to prick the crust.
Place another piece of greased parchment paper over the bottom of the crust and fill it with pie weights (or dried beans).
Blind bake for 15 minutes over a baking sheet, remove from the oven, and allow the shell to cool for 10 minutes before removing the weights.
Assembling and Baking
Preheat oven to 350F (180C)
Fill the par-baked tart shell 3/4 full with the almond cream.
Arrange the sliced poached pears over the frangipane, and sprinkle with almonds.
Bake over a baking sheet for 40-45 minutes, until the almond cream is puffed and the crust is golden brown.
Remove from the oven and allow to cool for 30 minutes before inverting the tart to a serving plate.
Cook the reserved poached water with the sugar and cook for 5-7 minutes.
Use a pastry brush to brush the pears with the syrup.
Notes
Leftover tart should be stored at room temperature for up to 3 days.
The crust and almond frangipane can be made up to three days in advance and stored in the refrigerator.
Use ripe and slightly firm pears, and don't skip the poaching step, it is important for the texture of the pears.
If the crust is getting too dark during baking, use a pie crust protector, or cut an aluminum foil ring to place over the crust.
The amount of pears you will use depends on the size of the pears.
You can use this recipe to bake 8, 9, or 10-inch tart. Adjust the baking time.