01 - Combine balsamic vinegar and honey in a small saucepan over medium heat. Simmer, stirring occasionally, until reduced by half and syrupy, approximately 5 minutes. Remove from heat and allow to cool completely.
02 - Slice tomatoes and mozzarella into 1/4-inch thick rounds. Press a small heart-shaped cookie cutter into each slice to create heart shapes.
03 - Arrange heart-shaped tomato and mozzarella slices on a serving platter, alternating and overlapping them. Tuck fresh basil leaves between the layers.
04 - Drizzle olive oil over the arranged salad and season with salt and pepper to taste. Complete by drizzling the cooled balsamic glaze generously over the top. Serve immediately.