From Wikipedia :
"Spanakopita
(ˌspćnəˈkɒpɪtə/;
Modern Greek:
σπανακόπιτα, from σπανάκι, spanáki, spinach, and
πίττα, pítta, pie) or spinach pie is a
Greek savory pastry
in the burek family with a filling of chopped
spinach, feta
cheese ...., onions or scallions, egg, and
seasoning. The
filling is wrapped or layered in phyllo (filo)
pastry with
butter and/or olive oil, either in a large pan
from which
individual servings are cut, or rolled into
individual
triangular servings ... Spanakopita
is golden in color
when baked, the color often enhanced by butter
and egg
yolk.