Wash the cherry tomatoes and pat them dry thoroughly. Cut a small, shallow hole in the top of each tomato to create a socket for the mozzarella.
Snap off tiny pieces of mozzarella and gently press one into each tomato socket, making it look like an eyeball with a white iris.
Carefully fold or tear basil leaves into tiny strips that resemble bloodshot veins, and place a small piece on top of each mozzarella ball for added creepy effect.
Arrange the finished eyeballs on a serving platter, spacing them evenly for visual impact.
Using a small spoon or pipette, carefully drizzle the balsamic glaze over each eyeball to mimic bloodshot veins and add a spooky touch.
Serve immediately, allowing guests to pick up the creepy little eyeballs and enjoy their fun, unsettling appearance.