Heat your oven to 180°C or 350°F.
Place a large frying pan on a medium heat, add the pine nuts, toast until they begin to brown and set aside.
Add oil to the pan and fry the onions until they are soft and translucent.
Stir in the garlic, nutmeg, salt and black pepper and fry for a minute more until fragrant.
Add the spinach to the pan, stir continuously until it begins to wilt, and stir in the mint and dill.
Remove the pan from the heat and add the lemon juice, lemon zest, feta and pine nuts, stir and set aside.
Melt the butter on the stove or in the microwave.
Use a pastry brush to spread melted butter onto a sheet of filo pastry.
Place another pastry sheet of filo directly on top and use scissors to cut it into 4 strips (note 1).
Place 2-3 tablespoons of the filling onto the bottom of one of the pastry sheets about ½ inch from the bottom and fold the corner diagonally to form a triangle.
Continue folding until you reach the end of the sheet. Brush the end with a little butter and fold down to seal.
Repeat these steps with the rest of the filling.
Place the filo triangles onto rack or baking tray (note 2), brush each one with melted butter and sprinkle with sesame seeds.
Bake for 15-20 minutes until lightly browned.
Leave on a wire rack to cool for at least 10 minutes before eating.