Two questions actually -- 1) How many patties does this recipe make? 2) Have you ever tried baking them instead of frying?
Looking through the photo slideshow and at the recipe itself, the serving size looks to be 2 per person, and the number served is 4-6. Doing the math and referring to the frying photo in the slideshow, 12 looks to be the total. As for baking vs frying, maybe try baking a few and see how they turn out for you.
It depends on how big you make them. A 2 inch diameter patty will yield about 18 patties.
There is no fat in the recipe, so baking them will result in a much drier texture. Adding a half cup of some sort of oil to the paste it might work.