This cooling salad is a summer favorite. Cucumbers, tomatoes, basil, red onion, and light balsamic vinaigrette make for an exceptional summer side dish that's even better when it's served on a bed of arugula. Cucumbers are thirst quenching and anti-inflammatory, tomatoes are ultra-rich in lycopene, and basil is a potent antioxidant that is believed to have anti-cancer and antiviral properties.