While dough rises, mix light brown sugar, spices, and salt together breaking up any clumps in sugar, set aside.
Folding (sometimes called punching) - When dough has doubled in size, continue with the next steps:
Gently dump dough onto a flat work surface, deflating the dough.
Dividing:
Pull sides of dough to center, flip over, and form a loose ball.
Bench Proofing or Resting:
Allow dough to relax (rest) for 10 minutes.
Dividing:
Flour your work surface.
Flip dough ball over (so seams are facing up). Flatten dough out into an 18" x 18" square (45 cm).
Spread evenly with softened butter, leaving a ½ inch (2 cm) border all around the square.
Spread the remaining apple puree evenly over the butter.
Then sprinkle evenly with the Apple Pie Spice Filling.
Press the filling down so it is flat.
Starting closest to you, roll the dough away from you into a cylinder, pulling it gently to tighten the roll so it stays uniform.
Pinch the seam together where the cylinder ends.
Turn the cylinder so the seam side is facing down.
Using a bench scraper, cut the cylinder into 12 equal pieces.
Make Up and Panning:
Turn the pieces on their side and lay cut side up in the prepared pan in rows of 3 across the short side of the pan and 4 down the long side of the pan.
Proofing:
Cover the pan with sprayed plastic wrap and set aside to proof until doubled in size, 30-45 minutes.
Baking:
Preheat oven to 350 F (175 C) degrees.
Remove plastic wrap, place pan in oven.
Bake for 45 - 50 minutes, turning pan half way through baking time so buns brown evenly.