Make sure you have a really nice old hard baguette, which is best for this salad. If you still want to make it but only have fresh baguette, tear the bread into pieces and bake in the oven at 200˚C with a generous drizzle of olive oil for 15 minutes until crisp.
Tear the bread into large pieces and drizzle with the vinegar. Cut the tomatoes into various pieces, slices or quarters for different textures. Cut the cucumber into half-moons. Arrange the bread, basil, tomatoes and capers on a large plate. Place large pieces of mozzarella on top. Season with plenty of salt and pepper and a drizzle of olive oil.