Tips come fast and furiously — the best sort of flour, adding a pinch of sugar if tomatoes taste metallic and the importance of not over-working the dough. A few things are key — a pizza stone being one of them. Put in the oven, it will up the temperature of your oven and ensure the base is fully crisped. I debate whether buying one will tip me into excess baggage. Kate admits to being such a fan that she has two pizza stones — one in her kitchen, the other, in her car, is a travelling pizza stone. Then we stretch the dough — "like scratching on a turntable" as we pull it into shape. If kneading was therapeutic pummelling, this is harder.