Eggplant are rich in fiber and minerals such as manganese and potassium, and clinical studies attest to its cardioprotective benefits. Grilling or roasting improves the availability of powerful antioxidants, particularly nasunin, a purple anthocyanin known to lower blood pressure and prevent brain cell damage caused by free radicals. Red pepper is full of vitamins (A, C, B6, and K), copper, and iron. The high amounts of vitamin A and beta-carotene in red peppers supports essential eye health. And while roasting does reduce vitamin C content by up to 25 percent, red peppers are absolutely loaded with the immunity-boosting compound — they have 210 percent more vitamin C than oranges.