Tomatoes, like potatoes, capsicums and eggplants belong to the nightshade family and are one of the world's most widely used vegetable crops - though technically the tomato is a fruit. Tomatoes are a good source of Vitamin C, beta-carotene, folate and potassium. Because the tomatoes are organic, they are grown without the use of pesticides, synthetic fertilizers, or genetically modified ingredients. Unpeeled diced tomatoes are tomatoes that have retained the outer peel and been cut into small cubes.