Dandelion greens refer to the leaves of the dandelion plant, which is a type of weed that grows in many regions around the world. These leaves are edible and have been used for centuries as a source of nutrition, particularly during times when other food sources were scarce. Dandelion greens are rich in vitamins A and C, iron, calcium, and potassium, making them a highly nutritious addition to the diet. They can be eaten raw in salads or cooked as a vegetable, often with garlic and olive oil.