Mix cucumber and water. Refrigerate until ready to serve.
Assemble Italian Subs: Cut the Italian sub roll in half lengthwise without completely splitting it open. Layer the deli-sliced ham and salami on the bottom half. Place the provolone cheese over the meats. Add the torn lettuce leaves, thinly sliced tomato, red onion slices, and sliced peppers on top. Drizzle with Italian dressing.
Serve Italian sub with chips, pickles spears, and a glass of cucumber water. Enjoy your meal!