Speedy pizza

Name: Speedy pizza
Cuisine: European, Italian, Mediterranean
Ingredients: 200g can chopped tomatoes (or 1/2×400g can); 1 tbsp tomato puree; 1/2 tsp dried oregano, or a few roughly chopped fresh; oregano leaves; 1 wholemeal pitta bread (around 58g); 2 roasted red capsicums from a jar (around 40g), drained and sliced; 2 chestnut mushrooms (around 45g) very finely sliced; 35g ready-grated mozzarella; 1 tbsp extra virgin olive oil