Mix the flour, gum, yeast, sugar and salt together in a large bowl then stir in the oil.
Gradually add in the water knead the dough into a slightly sticky ball.
Cover with a tea towel then put in a warm place for an hour or so to rise.
Pre-heat the oven to 250C with the pizza tray in it.
Divide the dough into 2 (for large pizzas), 3 (for medium pizzas) or 4 (for small pizzas) portions.
Sprinkle some flour onto a large piece of baking paper. Put one of the portions onto the paper, then sprinkle a bit more flour on top.
Use your hands to squash the dough down until it’s really thin and round, then squidge up the circumference to create a slightly thicker crust.
Lift the pizza - on its baking paper - onto the preheated baking tray. Bake in the oven for about 3 minutes then slide it off the paper directly onto the tray. Cook for another 3 or 4 minutes until lightly golden. Take it out of the oven.
Spread the pizza sauce on top, then arrange your chosen toppings evenly, and scatter some vegan cheese all over the top, if liked.
Bake for about 6-7 minutes until the toppings are done and the crust is crispy brown.
Repeat with the other pizzas.
Serve with a crispy salad.