Makes eight triangles
I used a seasoned salt that a friend whose family harvests salt in Brittany made and gave me, which has dried tomato, garlic, coriander, and paprika in it. I don’t know if adding those spices will raise the ire of purists (who will rightly claim this is actually called spanakopitakia), but you can season the filling as you wish. You’ll see I like the addition of a squirt of lemon juice, which brightens the taste. Adding some freshly-chopped mint is another option.I also used 2 sheets of filo per triangle, since each sheet was about 12-inches (25cm), but if you prefer less dough, you can use one sheet. There are folks make spanakopita in a pie plate, although individual triangles give you more of the crisp-crunch of the filo, and are easier to freeze in individual portions.
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
(2-3 ounces, 60-90g) melted butter,
1. Heat oil in a large saucepan or skillet. Add the onions and cook, stirring frequently, until transluscent.
2. Add the spinach and a bit of salt and pepper, cover, and cook until the spinach is completely wilted, stirring once or twice to hasten the process.
3. Scrape the spinach into a colander and let cool completely. Once cool, firmly squeeze out the excess liquid then chop the spinach with a chef’s knife into smallish pieces.
4. Mix the spinach in a small bowl with the feta and parsley until chunky. Taste, and add nutmeg and a squirt of lemon juice, plus more salt and pepper if desired. Stir in the egg.
5. Unwrap and unroll the filo and keep it covered at all times with a damp tea towel.
6. Working quickly lay one sheet of filo on the counter and brush it lightly, but thoroughly, with butter. Lay another sheet on top of it and brush it with butter as well.
7. Set a scant 1/4 cup (50g) of the filling in the center, about 1-inch (3cm) from the edge of the sheets of filo, then roll the two edges of the dough over, lengthwise, to encase the filling. You should have a long rectangle with filling underneath the top far end.
8. Brush the exposed surface of the filo with butter and fold one corner diagonally over the filling, then continue folding keeping the triangle shape (as you’d fold a flag) and brushing the exposed surfaces of the filo with butter, until you have a neat triangle. Brush the top with butter and set on a baking sheet in the freezer.
9. Continue making more spanakopitas with the remaining filling. Once all the spanakopitas are frozen, store them in a freezer bag until ready to bake. If well-wrapped, they’ll keep for a couple of months.
10. To bake the frozen spanakopita, preheat the oven to 350F (180C) and put the frozen triangles on a baking sheet, then brush each with butter. Bake for 30 minutes, or until deeply-golden brown. If you’re baking them without freezing them first, they’ll take less time to bake, so check them before the recommended baking time.

Serve warm, with a green salad, or part of a Middle Eastern dinner with favorite side dishes. I like to eat these accompanied with Retsina, a Greek wine that’s an acquired taste, due to the resin-flavor. The Achaia Clauss brand is the one I prefer and is available in well-stocked liqueur stores.