Sun-dried tomatoes are ripe tomatoes that lose most of their water content after spending a majority of their drying time in the sun. These tomatoes are usually pre-treated with sulfur dioxide or salt before being placed in the sun in order to improve quality. Typically, tomatoes spend 4-10 days in the sun in order for the sun-drying process to be complete.  Cherry types of tomatoes will lose 88 % of their initial (fresh) weight, while larger tomatoes can lose up to 93% during the process. As a result, it takes anywhere from 8 to 14 kilos of fresh tomatoes to make a single kilo of sun-dried tomatoes.
After the procedure, the tomato fruits will keep their nutritional value. The tomatoes are high in lycopene, antioxidants, and vitamin C. The final products may contain up to 2-6% of naturally occurring salt and could provide a significant contribution to the day\'s intake. Sun-dried tomatoes can be used in a wide variety of recipes.