Rub the plain flour and unsalted butter together until breadcrumbs are formed - slightly time consuming but worth it. You don't want the butter to be warm as the pastry won't work!
Add the icing sugar and mix in
Add the egg yolk and 1 tablespoon cold water and mix with your hands until combined and the egg is distributed well - the pastry should be smooth and a solid colour.
Grease a 23cm pie/tart tin with butter and lightly flour it
Roll the dough out on a lightly floured surface so its about 1-2 £1 coins in thickness.
Line the tart tin with the pastry as neatly as you can - it doesn't matter if it cracks slightly as you can plug the gaps with other pastry.
Chill in the fridge for 1 hour.
Preheat the oven to 200ºC/180ºC fan - If using pre-made pastry then simply grease & flour the tin like above, then line with the pastry.
Line the pastry case with some greaseproof paper and fill with baking beans/rice - you NEED to line it with paper first otherwise the weight will bake into the case and obviously be uneatable.
Bake the case in the oven for 15 minutes - once done, remove the paper and beans and bake for a further 5 minutes until it is cooked completely.
Remove from the oven and leave to cool in the tin.
Filling
Melt the milk and dark chocolate in a glass bowl over a pan of simmering water - don't let the water touch the bowl as it'll be too hot, you want the steam of the water to melt the chocolate through the bowl.
Once melted, remove from the heat and stir in the cream! Add some of the chopped hazelnuts now if you like, or just use to decorate.
Pour the chocolate mix into the case and place the washed & chopped strawberries into it
Sprinkle over the chopped hazelnuts and refrigerate until set!
ENJOY!
Notes
This tart will last covered in the fridge for 2-3 days - but it never lasts this long in my house.
You can used all milk chocolate, or all dark chocolate - but I think the mixture of both gives the perfect taste, otherwise its too heavy!
You can obviously use other nuts or fruit too - but I loooove this combination!