Preheat the oven to 250°C (480°F).
Turn the dough out onto a lightly floured work surface and knead for another minute.
Divide the dough into 4 equal portions and shape into rounds.
By using rolling pin roll the dough into a flatter circle. Transform the dough onto a baking sheet and roll it into a thin round.
Add and spread the Crème fraîche (2-3 tbsp) into each round, as well as a bit of onion and bacon (or bell pepper and cheese).
Bake for 10 minutes until crust on the edges turns golden brown.