For the tart shell:
90 g unsalted butter, cut into pieces
1 tablespoon vegetable oil
3 tablespoons water
1 tablespoon sugar
1/8 teaspoon salt
150 g flour
For the Lemon filling:
120 ml of lemon Juice (about 2 lemons)
6 large eggs
180g sugar
140g unsalted butter, cold, cut into pieces.
Finely grated zest of 3 lemons
For the Lemon glaze:
100 ml of lemon juice
1 tsp of arrowroot
4 tsp of granulated sugar
For the raspberry coulis:
200g raspberries
1 tbsp caster sugar, or to taste
1/2 tbsp lemon juice, or to taste
Making the tart shell:
Preheat the oven to 180º C.
In a medium-sized ovenproof bowl, such as a Pyrex bowl, combine the butter, oil, water, sugar, and salt.
Place the bowl in the oven for 15 minutes, until the butter is bubbling and starts to brown just around the edges.
When done, remove the bowl from oven, dump in the flour and stir it in quickly, until it comes together and forms a ball which pulls away from the sides of the bowl.
Transfer the dough to your work surface. At this point you can choose to line a 23cm tart mold with a removable bottom or individual moulds, in this case you will need 8 of them. Place the dough on your tart.
Once the dough is cool enough to handle, pat it into the shell with the heel of your hand, and use your fingers to press it up the sides of the tart mold. Reserve a small piece of dough, about the size of a raspberry, for patching any cracks at the end.
Prick the dough all over with the tines of a fork about ten times and cut any excess dough. Place the shells in the fridge for about 30 minutes.
Bake the tart shell in the oven for 15 minutes, or until the dough is golden brown.
Remove from the oven and if there are any sizable cracks, use the bits of reserved dough to fill in and patch them. Allow to cool before filling.
Making the Lemon filling:
On the top of a double boiler or a heatproof bowl, whisk together the lemon juice, eggs and sugar until blended. Add the butter, and set over simmering water.
Whisk the mixture constantly until thick and smooth, about 8 minutes. Do not let the mixture boil, be sure to scrape the bowl down occasionally as you wisk. The filling will thicken fairly quickly towards the end of the cooking period. Once it begins to thicken, simply cook it just a little longer. It will continue to thicken as long as you cook it, but you don't want to get it too stiff. Remove from heat.Strain the mixture into a clean bowl and whisk in the lemon zest.
Pour the custard into the tart shell. Bake until the filling is set and slightly golden, about 20 mins. Sometimes in baking, the lemon curd will start to boil and bubble. If it's just a little bit, that's ok, but it may mean the oven is too hot. Cool the tart to room temperature on a wire rack, 1 - 2 hours, or overnight.Remove the tart from the rim of the pan.
Spread a thin layer of Lemon glaze directly onto the surface of the tart. Gently spread it with the back of a spoon to achive an even layer. Allow to set for about 30 minutes.Serve at room temperature with raspberry coulis.
Making the raspberry coulis:
Put the raspberries, sugar and lemon juice into the bowl of a food processor and blend to a purée.
Set a sieve over a clean bowl and rub the purée through to remove the raspberry pips. Taste and add more sugar if required. Cover with cling film and set aside until needed.