filling (in this case the spinach mixture) evenly on top of these layers. take another ball of dough and again open it out to the size of the oven dish. place it on top of the filling and brush with olive oil. take the final ball of dough and open it out to the size of the oven dish plus enough to cover the edge. place it on top of the others and join the extra at the edge with the edge from the bottom layer, using olive oil so that the edge of the whole pie is nicely sealed. brush the top of the pie with olive oil.
lightly cut 