Pour the tomato sauce all over the meatballs and onions, turn the oven down to 200C/180C Fan/Gas 6 and bake for 35 minutes more. Check the meatballs are cooked through and the sauce has thickened.
Add the garlic and cook for a few seconds more, stirring constantly. Tip the tomatoes into the pan and stir in the tomato purée, stock, remaining oregano and the bay leaf. Add the meatballs and ...