Method
Preheat the oven to 190°C with a roasting tray inside.
Toss the potatoes with the olive oil, sea salt and cracked black pepper.
Transfer to the hot tray with the rosemary and roast for 35–40 minutes until golden and crisp.
Heat a pan over medium heat. Add a small splash of olive oil, then cook the onion for 4–5 minutes until softened.
Add the garlic, smoked paprika and cayenne pepper. Cook for 1 minute.
Add the chopped tomatoes and cook for 5–6 minutes until reduced and thickened. Remove the rosemary from the potatoes.
Toss the potatoes through the sauce with the fresh parsley.
Transfer to an ovenproof dish, top with mozzarella and bake for 2–3 minutes until melted.