Mozzarella balls: In a small bowl, combine the oil, Italian seasoning, crushed red pepper flakes. Add the mozzarella balls, mix, and season with salt. Set aside.
Assemble skewers: Thread a cherry tomato, a fresh basil leaf, a marinated mozzarella ball, and another cherry tomato onto the skewer. Arrange them neatly on your serving platter.
Balsamic Glaze: Bring the balsamic vinegar to a low simmer in a small saucepan. Let thicken until syrupy, about 15 minutes. Remove from heat and allow to cool and thicken.
Drizzle and Serve: Drizzle the skewers with balsamic glaze, serve, and enjoy!