Combine the lukewarm water, yeast and 10g of the sugar and set it aside to let the yeast foam.
In a large(ish) bowl, whisk together the flour, the rest of the sugar and the salt.
Once the yeast has lightly foamed, pour it into the dry ingredients along with the oil and orange blossom water.
Stir everything together until a rough dough forms then tip it out onto a lightly floured surface and knead a few times, about 5 minutes, just until it forms a nice smooth ball and doesn’t feel sticky.
Place the dough in a lightly oiled bowl, cover it with a damp tea towel and place it in a warm place to proof for an hour or until doubled in size.
Prepare a baking sheet lined with parchment paper or a silicone mat.
Once proofed, roll or pat the dough out on a floured surface to form a 50cmx30cm rectangle.
Spread the blueberry filling as evenly as possible all over the dough, then grab the 30cm side and fold it a bit further than the center. Do the same thing with the other 30cm side. Like folding a paper to put in an envelope.
Once the dough is folded, place the longest side in front of you and cut 8 equal strips. To make it easier, cut the dough in half, then those halves in halves and those halves/quarters into halves.
With each strip, grab both ends and pull lightly to extend it. Then with one hand twist towards yourself and with the other twist away. Spiral that twisted shape on itself and tuck the end underneath.
Place them on the baking sheet with some space in between and let them rest for 20 to 30 minutes or until they’ve lightly expanded.
In the meantime, preheat your oven to 190°C or 375°F and when the buns are ready, bake them for 18 to 20 minutes.
Let them cool on the baking sheet for about 10 minutes to let the filling set, then transfer them to a wire rack to cool completely.