Preheat the oven to 350F/180C and start by prepping the pastry. In a medium-sized bowl, stir together the white flour and salt.
Add in the butter and lard and rub them in with your fingertips until you have a breadcrumb-like consistency.
Pour in cold water 1 teaspoon at a time, stirring in between. Add water until the mixture comes together into a dough.
Roll the dough out onto a lightly floured surface until it's large enough to cover an 8 inch/20cm cake tin. (Or special quiche tin, if they exist.)
Line the cake/quiche/pie tin with the pastry and stab the bottom section all over with a fork to ensure even baking.
Pop the pastry case into the oven and bake for around 10 minutes, until it just starts to turn golden.
Whilst the pastry is baking, prep the filling. Dice the onion, apples and bacon and cook them all together in a saucepan over a medium heat until everything is soft. Stir regularly to ensure nothing burns or sticks to the bottom of the pan.
In a medium-sized bowl, beat the eggs together with a pinch of pepper.
Remove the pastry case from the oven and layer the onion, apple and bacon mixture into the bottom.
Pour the egg mixture on top and sprinkle over the cheese.
Pop the quiche back into the oven and bake for around 30-35 minutes until the top is golden and the filling has set.