Clean spinach and bring to boil, remove from heat and drain well. ( Same procedure for canned spinach.)
In a large bowel mix eggs, 1 cup crumbled Feta cheese, and spinach.
Prepare pastry.
grease a 14 inch diameter pan.
Set aside.
Combine broth, butter and remaining cheese.
place 10 pastry sheets in pan, brushing each generously with broth mixture.
Add spinach mixture , spreading evenly over entire surface.
Place additional 10 pastry sheets, brushing each generously with remainder of broth mixture.
Bake in 350 degree oven for 1 hour or until golden brown.