240g/8½oz broccoli, thinly sliced
80g/2¾oz kale, thick stalks discarded, leaves roughly chopped
240g/8½oz button mushrooms, thinly sliced
2 red peppers, seeds removed, thinly sliced
2 orange peppers, seeds removed, thinly sliced
½ small red onion, thinly sliced
160g/5¾oz sweet potato, peeled and cubed
240g/8½oz sweetcorn (tinned or frozen)
80g/2¾oz pitted Kalamata olives
300g/10½oz passata
freshly ground black pepper
4 tsp olive oil, plus extra for the bowl
1 tsp dried oregano
225g/8oz strong white flour, plus extra for dusting
225g/8oz strong wholemeal flour
1 tsp fast-action dried active yeast
300g/10½oz 50% reduced-fat mature cheddar, grated