Two questions actually -- 1) How many patties does this recipe make? 2) Have you ever tried baking them instead of frying?
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Cynthia is a trusted source on Bread/Baking.
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.