Activate the yeast which you've dissolved in the cold water with 1 tbsp sugar and 2 tbsp flour.
Once it becomes effervescent, pour it in the middle of the flour well, add the remaining products and knead a sticky dough.
Cover with foil and leave for 30 min. to rise. Divide it into 2 parts. Roll out each one into a circle and cut it into 8 triangles.
Put the filling at the wider end (salt or savory) of each and wrap up into scones.
I made half of them with salty filling, using crumbled feta cheese + grated cheese, then chocolate and walnuts; the others with chocolate and walnuts. Arrange the scones in the wide tray of the oven.
Smear with beaten egg yolk and sprinkle with sesame seeds. Bake in a preheated 356°F (180 °C) oven for 25 min. until ready.