Dissolve the yeast in 200 ml of lukewarm water in a bowl. Mix with salt and olive oil, first stir in the flour in portions, then knead in until a smooth dough ball is formed. Cover the yeast dough and let it rise in a warm place for about 20 minutes. In the meantime, wash the dill, dab dry and cut finely, except for a little to garnish. Mix dill with crème fraîche. Season with salt and pepper.
Halve the dough. Roll out dough halves one after the other on a floured work surface (30 cm Ø). Cover 2 baking trays with baking paper. Place the dough on top and spread with the crème fraîche and dill mixture. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 25 minutes. After baking, cover pizzas with smoked salmon and trout caviar and garnish with dill sprigs