The kidney bean is a variety of the common bean (Phaseolus vulgaris). It is named for its visual resemblance in shape and colour to a kidney. Red kidney beans should not be confused with other red beans, such as adzuki beans.
Red lentils are yellow lentils that have been hulled and split. They are a light red to orange color, small in size, and create a very smooth puree when cooked. Because they have been hulled and split, red lentils are also the quickest cooking variety. Black/beluga lentils are small and quite round in shape.