01 - Lay out the bread slices on a clean surface.
02 - Spread mayonnaise evenly on one side of each slice.
03 - Layer the tomato slices on two of the bread slices, slightly overlapping.
04 - Sprinkle the tomatoes with salt and pepper.
05 - Add basil leaves, if using, for extra flavor and freshness.
06 - Top with the remaining bread slices, mayonnaise side down.
07 - Gently press down and slice each sandwich in half, if desired. Serve immediately for the best texture.