In a large mixing bowl, stir together the flour, semolina and salt ... If you are making the pizza bases in advance, once the dough has been divided and rolled, cover and place into the fridge.
For the pizza dough, combine the flour, salt and yeast in a large bowl ... Sprinkle two flat baking trays with breadcrumbs or semolina and place the pizza bases on them. Spread the crème fraîche ...