Preheat the oven to 220ºC/200°C Fan/gas mark 7/425ºF.In a large bowl, using your hands, combine the mince, Parmesan, breadcrumbs or oats, parsley and eggs. Grate in (or mince and add) the garlic and add some salt and pepper. Do not overwork it, just lightly mix together, or the meat will become compacted and dense.Butter a shallow, round baking tin of about 28cm / 11 inches diameter and turn the meat into it, pressing the mixture lightly with your fingers to cover the bottom as if the seasoned minced meat were your pizza crust.Make sure you've drained as much runny liquid as possible out of your can of chopped tomatoes, then mix the tomato with the garlic oil, oregano and some salt and pepper and spread, using a rubber spatula, lightly on top of the meat base. Arrange the mozzarella slices on top, and then put in the oven for 20-25 minutes, by which time the meat should be cooked through and lightly set and the mozzarella melted.Remove from the oven and let it sit for 5 minutes, then adorn with some basil leaves and bring it to the table before cutting into wedges, like a pizza.