Bring the water and stock to a rolling boil
Add in the polenta and whisk , whisk , whisk
Cook the polenta for about 10 minutes , stirring well
Add in the butter , cheese, salt and herbs . Mix well
Check seasoning and add more if needed
Pour into a clingfilm lined tin , pat down and chill for a couple of hours
Heat oven to 200C
Tip out the polenta and cut into chips
Spray cooking oil on a baking tray put the chips onto it , spray again
Bake for about 30-40 minutes until crispy on the outside . Turning halfway through