Using a 1½-inch fluted round cutter, cut 16 rounds from frozen bread slices, discarding scraps. Cover with damp paper towels, or store in a resealable plastic bag.
Using the same cutter, cut 8 rounds from cheese slices.
Spread a layer of Golden Balsamic– Basil Aïoli onto bread rounds. Place a cheese round onto aïoli side of 8 bread rounds. Top each cheese round with a tomato slice. Cover each with a remaining bread round, aïoli side down.
Cover with damp paper towels, and let bread thaw completely (approximately 30 minutes) before serving, or cover with damp paper towels, place in a covered container, and refrigerate for a few hours until serving time.
Just before serving, garnish each with a fresh basil leaf, if desired.
Recipe by TeaTime Magazine at https://teatimemagazine.com/caprese-tea-sandwiches/