Sorry I'm not sure what you are asking? Can you use real mashed potato to make a pizza base? Yes but whether it would be syn free or not would depend on how you have made it. Butter and milk would need to be synned.
250g Mong/Moong Beans, soaked for 24hrs
56g cheddar cheese, grated
84g mozzarella cheese
Chorizos slices 0.5 syn each
1 Red pepper
1 chilli, deseeded
Soak the mung/moong beans for a minimum 24 hrs, changing the water several times, drain through a sieve, save the water.
Place into a food processor and if the beans don’t appear to liquidise add water until they do.
Pour into a small frying pan sprayed with Fry Light and cook for about 4 mins then turn over and cook the other side. Allow to cool.
Put Passata in a pan enough to cover Pizza base, add 1 TSP Tomato Puree and a few drops of “Worcester Sauce”, heat till thickened but DO NOT BOIL.
Coat the Pizza base with the Passata,
Add your choice of “Toppings”
Preheat the oven to 200c and using an oven mat place on the middle shelf for 20 mins or until the toppings are cooked.