Check the consistency of the filling and adjust, if necessary. If you need to thicken the sauce, stir 1 tablespoon of cornflour into 1/4 cup of water and then pour it slowly into the sauce while stirring, and continue to stir until thickened. Alternatively, if you need to thin the sauce, just add a little extra stock or cream. The filling should be thick enough that it won't run out of the pies when cut/bitten.