Serves 4
Heat the oven to 190°C/170°C fan-forced. Add the chopped vegetables to a large roasting pan/tin, drizzle with a tablespoon of oil and roast for 20 minutes.
In a large frying pan on high heat, drizzle the remaining oil and fry the meatballs for 4-6 minutes if frozen, if thawed halve the time.
Add the garlic powder and oregano and pour over the passata and simmer for 5 minutes until reduced slightly. Add the roasted vegetables and mix well.
Add the meatballs and vegetables to an oven-proof casserole dish, top with grated mozzarella, season with black pepper and bake for 25 minutes until golden and bubbling.