Lentils are a small, round, lens-shaped legume that come in many colors and sizes. Colors range from yellow and red to green, brown, and even black. Lentils are inexpensive, highly nutritious, and can be stored for a long time without refrigeration.

Lentils contain the third highest amount of protein of any legume, listed only below soybeans and hemp. The high protein content and low cost have made them an indispensable food item in many third world countries and among vegetarian populations. Although lentils are not considered a complete protein, when coupled with grains, such as rice or wheat, all essential amino acids are provided.

Lentils, as with many legumes, are also high in iron, fiber, and folate. Hulled lentil varieties, such as red and some black lentils, provide less fiber than varieties with the hull intact (green and brown).