you a clean edge and reveal the spiral inside. cut the roll in half along its full length, so that the insides are exposed, and then lay the two cut halves side by side on the counter with the chocolate side on top. pinch the top ends gently into each other, then lift one half over the other, keeping the chocolate side on top, and again push the bottom ends into each other to maintain the structure. lift the whole loaf carefully into your loaf pan. repeat with the second loaf.
cover the pans with a damp tea towel and leave to rise another 1½ hours at room temperature.
finally, bake in 