Spanokopita

1 pkg. fillo dough, melted butter or olive oil
1 large container cottage cheese
feta cheese
1 small container ricotta cheese
2 large bags frozen spinach
6 eggs
1 large onion, chopped
salt and pepper
In a large pan saute onions and then spinach till moisture somewhat evaporated. Mix in eggs and cheeses in same pan. In a large lasagne type pan, layer the fillo, dotting with butter or oil, ( about 6 sheets) and then spread half the filling. Do about 6 sheets more, spread rest of filling and finally the last sheets of the fillo with lots of butter spread on top. Bake about 1/2 hour or so at 350 degrees till browned on top.