Combine mince, onion, garlic, breadcrumbs, oregano, parsley, eggs and salt and pepper. Add most of the Grated Parmesan, reserving some to sprinkle on top
Combine well and roll into golf ball sized meatballs.
Heat a large oven proof pan to a medium/high heat. Add olive oil to the pan and lightly cook the meatballs, in batches if required, for 5-6 minutes or until browned on all sides.
Add the passata and season to taste.
Bake in the oven for 15 minutes. Remove from the oven, and tear the Fresh Mozzarella over the top of the pan. Bake for a further five minutes or until the cheese has melted over the top. Remove from the oven and serve immediately.