01 - Lay out the 4 bread slices on a clean cutting board or work surface.
02 - Spread mayonnaise evenly on one side of each bread slice using a butter knife or spreader.
03 - Arrange the thinly sliced tomatoes on two of the bread slices, slightly overlapping each piece for even coverage.
04 - Sprinkle the tomato layers with kosher salt and freshly ground black pepper to taste.
05 - Tear and scatter fresh basil leaves over the seasoned tomatoes for added aroma and freshness, if desired.
06 - Place the remaining bread slices on top, mayonnaise side facing down, and gently press each sandwich together.
07 - Cut each sandwich in half diagonally or straight down the middle, and serve immediately for optimal texture and flavor.