Put two generous tablespoons of the plain flour on a plate. In a bowl, add the remaining plain flour, corn flour, sea salt, and bicarbonate of soda. Mix briefly. Slowly add the lager or beer, adding more or less as necessary and whisking thoroughly until a smooth batter is formed. The consistency of the batter should be similar to single cream.

Heat oil for deep frying to 180C. Cut the pizza into two equal pieces.

When the oil is hot, press the pizza half cheese side down into the plain flour, then into the prepared batter mix, allowing any excess to drip off. Carefully drop the coated pizza into the hot oil, cheese side down. Fry for about 1-2 minutes on each side, until the batter is golden and crispy.

Remove the fried pizza crunch from the oil with tongs or a slotted spoon. Drain off any excess oil and set aside on a plate. Season with salt and vinegar, or salt and sauce, and serve.