To make the pizza dough, combine all the ingredients in a bowl and then turn out on to a worktop. Knead thoroughly for 10 minutes until stretchy and elastic. Form into 2-3 balls and put into an oiled bowl. Cover with a teatowel and leave to rise in a warm place for 90 minutes.
Meanwhile make the puree. Blitz all the ingredients together and season with salt and pepper. Push through a sieve to remove the skins and keep refrigerated until needed.
After 90 minutes, preheat the oven as high as it will go with a pizza stone in. Roll out the dough on a floured surface. Add the sweetcorn puree and add the other toppings to taste. Cook for 4-5 minutes until golden and risen. Serve immediately.