Then put all the ingredients for the dough in the food processor and knead for about 5 minutes. Add a little more water if necessary. The dough should no longer stick.
Braise the onion rings in a little water for about 5 minutes. Then put the onions in a sieve and drain well.
Now roll out the dough thinly into an elongated flatbread and place on a baking sheet lined with baking paper. Using a pastry card, coat the dough thickly with crème fraîche and season with pepper, nutmeg and allspice. Now cover the tarte flambée with the onion rings and diced ham.
Bake in the preheated oven for about 20 minutes until the base is nice and crispy.
The tarte flambée becomes particularly crispy when it is baked on a pizza or bread baking stone. Alternatively, a simple granite tile from the hardware store is also possible.
Tip:
Instead of onion rings, you can also use blanched leek rings