Line a baking tray with a sheet of nonstick baking paper, but if you don't have it, that's fine. You can simple use a nonstick baking tray.
Place the bread slices on the baking tray and set aside.
Into a bowl, add the tomato paste, the salt, the black pepper and the oregano, mix very well. Add the oil or olive oil and mix very well again.
Spread this tomato sauce all over the bread slices, to taste - you can add any amount you want.
Grate some mozzarella cheese and sprinkle over the bread slices.
Add some sweet corn to taste, also add the smoked sausage cut into round slices.
Add black olives to taste. Top it with some more grated mozzarella cheese, but that's optional and to taste, you don't have to add it.
Bake in a preheated oven at 200°C (392°F) for 20 minutes.
Serve.