Combine the flour and butter in a food processor until it looks like fine breadcrumbs. Slowly add water until the dough forms. Transfer the dough to a floured surface, knead until smooth, shape into a disc, wrap in plastic, and chill in the fridge for 20 minutes.
Roll out the pastry to a 3mm thick disc between 2 sheets of non-stick baking paper. Line a 22cm fluted tart tin with the pastry, trimming any excess. Chill in the fridge for 30 minutes before using.
1. Preheat your oven to 190°C.
2. Line the pastry base with baking paper and weigh it down with rice, dried beans, or metal baking weights.
3. Place the tart tin on a baking tray and bake for 10 minutes.
4. Remove the paper and weights, then bake for an additional 10 minutes until the base is golden and fully baked.
5. Take the tart out of the oven and reduce the temperature to 180°C.
In a large frying pan over medium-high heat, melt butter. Add onion and bacon, cook and stir for 6-8 minutes until bacon is crisp. Transfer to a paper towel-lined plate. In a large jug, whisk egg, cream, and cheese together using a balloon whisk. Season with pepper.
Sprinkle the bacon mixture evenly over the pastry base, then pour in the egg mixture. Bake in the oven for about 30 minutes until it is just set and has a beautiful light golden color.
Take the dish out of the oven and let it rest in the tin for 5 minutes. Then, carefully remove it from the tin, slice it into wedges, and enjoy alongside a mixed salad, if preferred.