For the stuffing:
Heat the olive oil in a sauteuse.
Add the spring onions, leek, 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.
Add the dill, feta cheese, eggs (lightly beaten) and pepper, and stir well.

For the rolls:
Lay the sheets on a surface and cut them in 4 strips.
Take 1 strip, smear with olive oil and cover with a second strip.
Add 1 tbsp stuffing, seal the sides and fold into a roll.
Repeat the same procedure with all the sheets and stuffing.
Transfer the rolls into a non-stick baking pan, oil the surface of the sheets and bake in a preheated oven, in air, at 180°C for approx. 20 min, until golden brown.