Preheat oven to 400°F.

Squeeze out excess liquid from the spinach.

In a large bowl, mix together the spinach, onion, feta, olive oil, salt, pepper, eggs, flour, cottage cheese, and Parmesan cheese.

Lay out 7-10 phyllo sheets. On the bottom of the baking pan, lay out a sheet of phyllo, allowing it to come up the sides, pour or scoop some melted butter on top, and have your assistant spread the butter around. Then do the next sheet, and so on.

Now add the filling mixture and smooth out the top.

Working like before, you and your assistant should layer 7-10 buttered phyllo sheets on top of the filling, tucking them in along the edges, if necessary.

Bake for 45-55 minutes, or until the top puffs and browns.