Once your dough has completed its first proof, leave this in the refrigerator to stay cool while you prep your pan and filling. Line your baking pan with parchment paper and set aside.
For the filling, simply mix together all the filling ingredients (reserving the yolk from the egg for an egg wash) in a mixing bowl until you have a spreadable paste.
Dust a work surface with flour and scrape your dough out onto it, press the dough into a rectangle. Then using a rolling pin to roll out to about 12" wide by 15" long.
Spread the filling mixture over the surface of the dough, leaving a small gap around the edges.
Then roll up from bottom to top to form a tight log.
Use the floss to trim about an inch or so off each end of the log, removing unfilled and uneven dough. Then divide the remaining log into 9 and slice using the floss.
Place these rolls in your baking pan and cover with a clean kitchen towel to proof at room temperature for about 2 hours, until doubled in size.
Preheat the oven to 350ºF (175C/155C Fan) and make a quick egg wash with the remaining egg yolk from your filling.
Brush the rolls with the egg wash and sprinkle over a generous handful of pearl sugar.
Bake in the centre of the oven for about 30 minutes, until risen and golden on top.
Remove from the oven and allow to cool for about 10 minutes while you prepare the frosting drizzle.