For the Tyrolean tarte flambée, first put flour with finely crumbled yeast, olive oil, salt and lukewarm water in a bowl. Knead with a food processor or with your hands to a nice dough. Cover the dough and let it rise in a warm place.
Peel the onion and cut into thin rings. Then fry them with butter in a pan for a few minutes until they get color.
Mix crème fraîche with salt and pepper.
Preheat the oven to 200 °C. Divide the yeast dough and roll out into a thin patty. Place on a baking tray lined with baking paper and spread each patty with crème fraîche. Top with onion and strips of fine bacon.
Bake the Tyrolean tarte flambée in the oven for about 10 minutes until crispy. Then sprinkle with a little chives and serve fresh.