Onion and rosemary focaccia

Serves approx. 4 people 20g yeast (half a cube)400g flour50g corn polenta semolina1/2 tsp salt6-7 tbsp rapeseed oil (alternatively olive oil) 1 tsp fleur de sel2-3 sprigs rosemary200g finely chopped fried onions100g corn polenta semolina20g black sesame seeds Preparation:Dissolve the yeast in 200 ml lukewarm water and work into the flour, add the semolina and approx. 5 tbsp rapeseed oil and a small pinch of salt [...].