Featuring: Tasty, healthy, and beautiful! This easy and colourful grilled vegetable skewer recipe is a cornucopia of eye-healthy ingredients and is perfect for summer! Bell peppers and zucchini are rich in vitamin C and beta-carotene, which help protect your eyes from damage caused by free radicals. Corn on the cob provides lutein and zeaxanthin, antioxidants that reduce the risk of chronic eye diseases. Summer squash adds to the mix with potassium, maintaining proper eye pressure.