Kidney beans are commonly added to dal makahni so add about 1 cup of cooked kidney beans if you like. If you don’t have a pressure cooker, you can easily cook the lentils in a large pot. Just bring lentils and water (you will probably need a couple extra cups of water) to a boil, cover, turn heat to medium-low and cook. It will probably take about 45 minutes. If there is a bunch of extra liquid left in the lentils, it’s totally fine. Just add less water later.