Pumpkins and squash have a high water content. In order to avoid soggy pies, traditional Greek recipes usually include one of 3 methods to remove the excess water. One method involves adding rice, breadcrumbs, or semolina flour to the filling. This helps absorb any extra liquid from the pumpkin. Another method is to put the shredded pumpkin in a skillet  and cook it for a few minutes. This helps evaporate the excess water. The third method is to squeeze out the liquid by hand.