This vegetarian / vegan version of Refried Beans made using Kashmiri Rajma (Kidney) Beans is the base recipe for many Mexican favourites- Loaded Nachos, Quesadillas, Tostadas etc.
The pressure cooker or the pressure pan is the quickest way to cook beans of any kind. If you don't have one, simmer the beans in a pot of water for around 90 minutes or so until they are cooked to a much.