Lettuce

Lettuce may lack in overt flavor, it makes up for in its texture and crunchiness. Its tightly bound and broadly shaped leaves are thick-walled and concentrated with more water than virtually any other green.
Lettuce is one of the salad crops, although it is also seen in other kinds of food, such as soups, sandwiches and wraps; it can also be grilled.
Lettuce is a rich source of vitamin K and vitamin A, and a moderate source of folate good source of potassium, iron, calcium, fiber.