Preheat the oven to 200C, fan 180C, gas mark 6

Chop the mushrooms, peppers and cherry tomatoes into small pieces.

Grate the cheese.

Pop the pitta bread in the toaster for a minute then leave to cool. Cut the pittas in half using a knife.

Spread the tomato purée over the pitta halves then add the mushrooms, peppers, sweetcorn, tomatoes and cheese.

Cook on a baking tray in the oven for 10-12 minutes until the cheese has melted.

Serve with shredded iceburg lettuce