Remove the mozzarella balls from the brine and drain them completely. If using any larger balls, cut them to the same size as the mini balls.
In a bowl, combine the chives with the olive oil and freshly ground pepper. Add the drained mozzarella balls and let them marinate for at least 3 hours, or overnight.
Wash the cherry tomatoes and halve them.
Remove the marinated mozzarella balls from the bowl, reserving the liquid. Thread each ball onto a toothpick, positioning a tomato half and a small portion of the mixed herbs alongside it.
Season the reserved marinade with lime juice or balsamic vinegar to taste, then drizzle it over the assembled skewers.