Here are few vegetables that better mark the summer months than the sweet juiciness of a vine-ripened tomato. Instead they have a subtle sweetness that is complemented by a slightly bitter and acidic taste. In the area of food and phytonutrient research, nothing has been hotter in the last several years than studies on the lycopene in tomatoes. This carotenoid found in tomatoes (and everything made from them) has been extensively studied for its antioxidant and cancer-preventing properties.