01 - Combine balsamic vinegar and honey in a small saucepan. Bring to a gentle boil over medium heat, then reduce to a simmer. Cook for 8-10 minutes, stirring occasionally, until reduced by half and syrupy. Remove from heat and allow to cool completely.
02 - Slice tomatoes and mozzarella into 1/4-inch thick rounds. Using a small heart-shaped cookie cutter, cut each slice into heart shapes. Reserve trimmings for another use.
03 - On a serving platter, alternate layers of heart-shaped tomato and mozzarella slices. Tuck fresh basil leaves between each layer for visual appeal and flavor distribution.
04 - Drizzle assembled salad with extra-virgin olive oil and cooled balsamic glaze. Season generously with sea salt and freshly ground black pepper to taste.
05 - Present immediately while fresh, garnished with additional basil leaves if desired. Best served at room temperature.