Mediterranean layered sandwich

Method

1. Bake the ciabatta loaves, if necessary (check the pack instructions) so they are crisp. Leave them to cool.
2. Cut the loaves in half. Scoop out some of the bread from the halves and discard it (or use it to make breadcrumbs). Mix the pesto and olive oil together, then brush this over the cut surfaces of the bread.
3. Use half of the rest of the ingredients for each loaf. Working on one loaf at a time, spread half the peppers over the bottom of the loaf, then arrange half the sliced tomato on top. Season the tomato with salt and pepper, and scatter over the olives and some torn basil.
4. Top with mozzarella slices then layer up the remaining ingredients in reverse order (i.e. olives, torn basil, tomato slices and then the peppers).
5. Place the top on the loaf. Wrap the loaf in parchment paper and tie tightly with string to hold it tog ether. Fill the other loaf and wrap in the same way.
6. Chill loaves for at least 4 hours or overnight, turning them over once or twice so the juices from tomatoes are evenly absorbed.
7. To serve, keep the loaves wrapped and slice each into 4. Do this in advance, or take a knife and cutting board to the picnic.