Sun-dried tomatoes are ripe tomatoes that lose most of their water content after spending a majority of their drying time in the sun. The tomatoes are high in lycopene, antioxidants, and vitamin C. Sun-dried tomatoes can be used in a wide variety of recipes and come in a variety of shapes, colors. Sun-dried tomatoes may also be preserved in olive oil, along with other ingredients such as rosemary, basil, dried paprika, and garlic.