Mock Apple Pie

Crush finely with a rolling pin, one large Boston cracker; put it into a bowl and pour upon it one teacupful of cold water; add one teacupful of fine white sugar, the juice and pulp of one lemon, half a lemon rind grated and a little nutmeg; line the pie-plate with half puff paste, pour in the mixture, cover with the paste and bake half an hour.