Preheat the oven to 180 C.
Toss the potatoes with rosemary, salt, pepper and a generous amount of olive oil in a large baking dish and bake for 20 minutes.
Shuffle the potatoes before adding the shallots and chorizo, drizzling again with a splash of olive oil, sprinkling with the smoked paprika and baking for a further 10 minutes.
Add the mushrooms, broccoli and tomatoes, again drizzling with olive oil and some balsamic glaze, bake for a further 15 minutes.
Dice the mozzarella and scatter over before returning to the oven for a further 5-10 minutes.
Serve with crusty bread!