Place the milk and lemon zest into a saucepan and place on the stove on a medium temperature
Bring up to blood temperature and sieve into a jug
Place the egg yolks and fructose into a mixing bowl and whisk until at ribbon stage
Slowly whisk in the flour until completely incorporated
Temper the eggs with the sieved milk and whisk to combine
Add the vanilla essence and return the custard to the sauce pan
Stir over a medium temperature with a wooden spoon for 5 minutes
Pour back into the mixing bowl and cover with cling film
Place into the fridge to cool completely
for the pastry
Sieve together the flour, fructose, baking powder and salt into a large bowl
Add the butter and rub in using your fingertips until it resembles fine breadcrumbs
Add the zest and mix in
Whisk together the egg yolks and water and add to the flour
Mix in until the dough starts to form
Turn out onto a lightly floured surface, shape into a ball and flatten into a disc
Cover with cling film and place into the fridge for 30 minutes to chill
for the torta
Roll the pastry out to 3mm thick and place into a lined flan tin, setting aside the leftover pastry
Dock the bottom of the pastry before carefully filling with the Italian pastry cream
Roll out the leftover pastry into a 4mm thick disc
Cover the top of the pastry cream with the pastry, sealing the edges using a fork
Place into the fridge while you preheat the oven
Preheat the oven to 200° Celsius
Top the pastry with pine nuts and bake for 35 minutes
Remove from the oven and leave to cool before removing from the tin
Dust with icing sugar before serving
Notes
I baked mine for 40 minutes which was too long. Had the torta not needed so many egg yolks I would have baked it again for 35 minutes as I have noted here in the recipe