Cut the loaf in half lengthways and remove all the doughy bread from the base and the lid. Save the removed bread for breadcrumbs.
In the base of the loaf, place a layer of lettuce, and top with the sliced tomato, shredded chicken (or ham or tuna, if preferred), carrot, sliced eggs, the basil and a drizzle of olive oil.
Replace the lid of the loaf and squash down firmly. Wrap in foil or nonstick baking paper and store in the fridge overnight with an even weight on top to compress.
When ready to eat, remove wrapping and slice.
Looking for more delicious lunch ideas? Why not try our Halloumi and Pepper sandwich recipe?
For top tips on protecting you and your family when preparing raw meat and poultry, visit Food Safety in the Home and view the full Food safety at home video.