For the stuffing:
Heat the olive oil in a sauteuse.
Add the spring onions and leeks, minced.
Salt and pepper, and saute for a few minutes.
Add the spinach and continue to saute for 2-3 min, until they shrivel.
Remove from the fire and leave the mixture aside to cool down.
Moreover, add the dill, feta cheese, eggs (lightly beaten) and pepper, and stir well.

For the triangles:
Lay the pastry sheets horizontally, one on top of the other, and cut them vertically in 4 equal strips.
Lay 1 strip on a surface and smear with olive oil. Then, cover with a second sheet. Oil the second sheet as well.
Place 1 tbsp stuffing on one edge (angle) and start to fold the strip diagonally and alternately, upwards, folding in a triangular shape.
Repeat the same procedure with all the sheets and stuffing.
Place the triangles in a baking pan and smear them with olive oil.
Sprinkle with white sesame and bake in a preheated oven at 1800C, for approx. 20 min, in air, until golden brown.