Cut the bread in two horizontally and hollow out the lower section.
Brush pizza sauce onto the bottom, and spread the mozzarella slices on top of this. Then add a layer of salami slices, before scattering chopped onion on top of them. Add the basil leaves and then the smoked sausage on top of that. Cut the green pepper into strips and add that in too. Finally, sprinkle the lot with cheddar cheese.
Place the upper "lid" of the bread back on top and wrap the whole thing in aluminum foil. Use a heavy wooden board to weigh the loaf down for a few seconds. Then add more cheddar cheese on top, with a few more slices of sausage.