Prep the cucumbers: Slice the English cucumber into 1/2-inch coins. If the skin is thick, peel alternating strips for a pretty pattern.
Pat the slices dry to avoid excess moisture on the platter.
Dry the cheese: Drain the mozzarella balls and gently pat dry with paper towels. This helps the skewers hold together and prevents the glaze from sliding off.
Sort the basil: Pick medium-size leaves. If your leaves are large, stack and tear them into bite-size pieces.
Keep them as whole as possible for best flavor.
Assemble the skewers: On each toothpick, layer a tomato, a folded basil leaf, a mozzarella ball, and finish with a cucumber coin as the base. Press down gently so the cucumber acts like a little platform.
Season: Arrange the skewers on a platter. Lightly drizzle with extra-virgin olive oil, then zigzag a small amount of balsamic glaze over the top.
Finish with a pinch of kosher salt and a few grinds of black pepper.
Taste and tweak: Try one and adjust. Add a bit more salt, a touch more glaze, or a squeeze of lemon if you want extra brightness.
Serve: Keep chilled until guests arrive, then set out and watch them go.