Using a serrated knife, cut the top quarter of your loaf. Remove any excess bread on the inside of both sections, leaving a 2 cm shell of bread on both sides.
Combine mayo and pesto. Add to both bottom and top of bread.
Layer the remainder of the ingredients however you’d like, keeping them in layers and filling the corners of the loaf cavity.
Place top back on bread, wrap and refrigerate for 1 hour minimum or up to overnight for maximum flavour. Place a heavy pot or lid on top of bread. This helps create those firm layers.
