Preheat your oven at 170 C.
Lay out your bread slices on a baking tray. Apply a thin layer of pizza sauce on each slice. Recipe of sauce here: Pizza Sauce
Sprinkle a little bit of cheese on top of the pizza sauce. I used mozzarella. This helps the topping to 'grip' to the base, so you won't have topping that falls off your pizza.
Then add whatever topping you like on the slices. I used this one: Spicy Chicken Filling
You can include additional toppings if you like, I added slices of onion, some extra capsicum strips, sweet corn, pineapple chunks.
Finally, sprinkle some more cheese and drizzle a little bit of ketchup on top.
Bake until the cheese is melted. Remember, the bread is already cooked, so they don't need to bake too long. It should take around 10 minutes or so, keep an eye on them and get them out when the cheese is all melted and slightly golden.
I mostly use my oven toaster to make these quick pizzas, saves on a lot of energy as opposed to baking them in an oven.
Let them cool slightly on a rack so the bases stay nice and crisp.
Enjoy your quickie pizza-fix!