Rajma Black is Kidney beans, also known as rajma, is a well-known pulse that is extensively used all over the world in the preparation of a variety of dishes, particularly in rice, curries, salads and toppings. Mexican foods that are popular all over the Globe. And kidney beans is the main component that is used in preparing the dishes. Kidney beans are an excellent source of molybdenum. They are a very good source of folate, dietary fibre, and copper. Kidney beans are a good source of manganese, phosphorus, protein, vitamin B1, iron, potassium, and magnesium.