fresh Lettuce Mix that is hygienically packed. It is a mix of different lettuce leaves. It is most often grown as a leaf vegetable. Lettuce is most often used for salads, although it is also seen in other kinds of food, such as soups, sandwiches and wraps; it can also be grilled. The leaves are most popularly added to salads with other greens as the curly leaves increase the surface area and have the ability to catch and hold salad.