Spanakopita

Name: Spanakopita
Ingredients: 2 tablespoons olive oil; 1 medium onion, peeled and minced; 12 ounces (325g) fresh spinach, well-washed and towel dried; salt and freshly-ground pepper; 8-10 ounces (230-250g) feta cheese; 2 tablespoons finely-chopped flat leaf parsley; pinch of freshly-grated nutmeg; 1 large egg, at room temperature; lemon juice; 16 sheets filo dough (about 12 ounces, 350g), thawed, if frozen; Melted butter (2-3 ounces, 60-90g)