Preheat your oven to 200°C (fan 180°C, gas mark 6).
Roll the dough on a flour dusted surface to a rectangle about 25cm x 40cm. Scatter over the basil, veg and mozzarella and season. Tuck the short sides in (to stop the filling escaping) and roll up from the long side like a swiss roll. Lift onto a baking tray, seam-side down.