Cover your baking sheet with parchment paper.
On a floured work surface, roll the dough out into a large rectangle (about 35 x 50 cm).
Cover the dough surface with the tahini (leaving free a small border of 1 cm)
Sprinkle the surface with the sugar/cinnamon mixture. Let it stand for 10 minutes, so the sugar adheres to the tahini.
Lift up one of the wider sides of the dough, and roll it to form a closed roll. Trim the edges so they are uniform (I keep them for baking, they don't look beautiful but they are just as good)
Cut into slices of about 4 cm (I do this by eye). This should give you 10 pieces.
Turn your pieces over (to see the snail shape), and slightly flatten them with the rolling pin (the filling might escape out a bit, so clean your rolling pin if necessary, otherwise your little brioches will be covered with the filling, which is not so aesthetic). Place the brioches on the parchment paper (on the baking sheet). Cover with a clean cloth and let them stand for 15 minutes.