Preheat the oven to gas 6, 200°C, fan 180°C. Place the meatballs onto a baking sheet and heat in the oven for 5 minutes.
In a small bowl, mix together the tomatoes and tomato purée. Spoon the mixture onto the mini pitta breads and top with the grated cheese.
Remove the meatballs from the oven and use to top each pizza, along with all of the other ingredients. Be as inventive as you like!
Place the pittas onto the baking sheet and return to the oven to cook for 6 minutes.
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For top tips on protecting you and your family when preparing raw meat and poultry, visit Food Safety in the Home and view the full Food safety at home video.