Preheat oven to 200°C. Line a baking tray with baking paper. Carefully cut each muffin in half so you have 8 rounds. Place muffins, cut-side up, onto baking tray.
Spread tomato paste over muffins.
Add desired toppings then sprinkle cheese over the top
Bake for 10 minutes or until the cheese is melted and muffins are golden
Adjust the recipe to taste using additional toppings like pineapple, capsicum, mushroom, bacon or onion