what is a lentil bean?

a little bean smaller than a pea its kinda flat & its light greenish color. sorry its hard to explain. lol

This site even has pictures!

Like other legumes, lentils are low in fat and high in protein and fiber, but they have the added advantage of cooking quickly. Lentils have a mild, often earthy flavor, and they’re best if cooked with assertive flavorings. The best, most delicate lentils are the peppery French green lentils. These hold their shape well, but take longer to cook than other lentils. The milder brown lentils also hold their shape after cooking, but can easily turn mushy if overcooked. Indian markets also carry a wide variety of split lentils, called dal. Before cooking, always rinse lentils and pick out stones and other debris. Unlike dried beans and peas, there’s no need to soak them. Lentils cook more slowly if they’re combined with salt or acidic ingredients, so add these last. Bigger or older lentils take longer to cook. Store dried lentils for up to a year in a cool, dry place. Substitutes: dal OR split peas OR black-eyed peas

Humans have been dining on lentils for centuries. These lens- shaped edible seeds, scientifically classified as the Lens esculenta or Lens culinaris, have been discovered in Bronze Age dwellings on St. Peter’s Island in Switzerland. The Bible (Genesis 25:34) records that Esau sold his birthright for a “pottage of lentils”. Orange lentils are found in India, Africa, and the Middle East. Botanists are still hunting for clues about the origin of the plant. Meanwhile, vegetarians delight in the flavor and nutritional benefits of its seeds.