Butter a loaf tin of about 30 cm/ 12 inches, butter the edges as well, the dough will rise and it tends to stick there. Set aside.
Roll the dough onto a lightly floured surface to a rectangle of about 45x32 cm/18x13 inches.
Grate the mozzarella and the Parmesan. Reserve 1 tablespoon of the grated Parmesan. Reserve about 1 heaped tablespoons of the herb butter as well. Set aside.
Spread the remaining butter on the rolled dough. Place small heaps all over and use a tablespoon or your hands to spread it evenly, the warmth of your hands will help to spread the butter properly.
Sprinkle the dough with pine nuts and grated cheese.
Cut the dough into 3 even slices lengthwise. Cut across into 5 slices, each slice should be about 9 cm/3.5-inch wide providing you rolled the dough as instructed above. You will now have 15 squares.
Form 3-4 piles by stacking the pieces over each other. Keep one last piece to close the loaf once it’s in the loaf tin.
Carefully, lift the piles and arrange them in the prepared tin. Place the last piece at the end with the filling facing inside, so that you close the loaf. The pan will look very crowded now with the pieces all crowded on one side. Very gently arrange the pieces so that they snuggly fit into the loaf tin and they fill it completely.
Cover and let rise in a warm place for about 30 minutes.