In a large bowl, (using your hands is better) gently mix together the mince, herbs, salt and pepper, diced onion, egg and breadcrumbs.Make into small balls the size of a golf ball and place on baking paper on a baking tray.Bake in the oven for 20 mins (or until cooked through) at 180 C. While the meatballs are cooking, make the tomato sauce.
Quick tomato sauce
In a pan, heat the olive oil, add the onions and cook on low heat until soft.
Add the garlic and tomato purée. Cook for a few minutes then add the chopped tomatoes and oregano. SSeason generously and simmer for 20 mins.