Drain the cans of sardines into a fine sieve with a bowl underneath, then transfer the sardines into a large bowl, using a large wooden spoon, break the sardines apart

Add the mayonnaise over the sardines, along with the dijon mustard, chopped celery, chopped red onion, grated garlic, chopped parsley, lemon juice and lemon zest, then season with sea salt & black pepper and mix together until well mixed

Lightly toast the slices of sandwich bread

Add the sardine salad over the slices of toast, top off with slices of cucumber, slices of tomato, shredded iceberg lettuce and another slice of toast, enjoy!