Crumble the yeast and mix with sugar until the yeast becomes liquid. (This saves the pre-dough.) Put flour, 1/2 teaspoon salt, 6 tablespoons oil and 300 ml lukewarm water into a bowl. Add mixed yeast and knead immediately to a smooth dough.
Cover the dough and let it rise in a warm place for about 30 minutes. In the meantime roast almonds in a pan without fat for the pesto. Wash the dill, shake dry and pluck flags from the stalks, except for something to garnish.
Finely chop the almonds, dill, parmesan, lemon juice and 3 tbsp. oil with a hand blender. Season to taste with salt and pepper. Wash the asparagus, cut off the woody ends. Cut the asparagus in half lengthwise. Peel shallots and cut into strips.
Mix sour cream and crème fraîche, season with salt and pepper. Quarter the yeast dough and knead again. Roll out one quarter oval (35 x 25 cm). Line a fat pan with baking paper. Put the dough in.
Spread a quarter of the sour cream on the dough. Spread a quarter of the asparagus and shallots evenly on top. Bake in the preheated oven (electric range: 250 °C/ convection oven: 225 °C/ gas: level 5) on the bottom shelf for 10-12 minutes.
In the meantime, process the remaining dough and topping in the same way. Bake the tarte flambée one after the other. Cut the finished tarte flambée into pieces and cover with salmon. Drizzle with pesto and garnish with dill.