Drain the cans of tuna into a fine sieve with a bowl underneath, gently flake the tuna to remove any excess oil, then transfer into a large bowl, along with the mayonnaise, dijon mustard, red onion, garlic, dill pickels, parsley, lemon juice and season with sea salt & black pepper, mix together until well mixed
Lightly toast the slices of sandwich bread
Add the tuna salad over the slices of toast, top off with slices of tomato, shredded iceberg lettuce and another slice of toast, enjoy!
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