Dump some of the filling mixture in the centre of each square. Keep in mind that this is only half of the dough, and you are going to be doing the same with the rest in a minute.
  
 
 Step 11:

Another difficult bit. Fold the sides up to enclose the filling and squeeze the seams shut. Then turn the whole thing upside down, shove it on a greased baking tray, paint the top with egg, and sprinkle on a little brown sugar. Repeat all this for the other half of the dough to make another 8 or so cakes. Bake for 12-15 minutes.