Read this in Hindi From Mexican cuisine -- tacos burritos etc to our very own rajma-chawal red kidney beans are used extensively all over the globe. They are called 'kidney beans' due to their shape which resembles the human kidney. They are one of the tastiest beans and belong to lentils food group. Red kidney beans are known as 'rajma' in India and they form an important part of a vegetarian diet due to their excellent protein content. But the protein they contain is incomplete and they should always be paired with a cereal (carbohydrate) to improve their biological value