Melt the butter in a pan over medium heat. Add the onions, and fry until soft.
Stir in the keema; cook until evenly browned.
Push all of the beef and onion out to the sides, leaving a pool of butter in the centre. Stir the marmite into the butter, and mix until well blended. Mix with mince and onions.
Stir in the paprika, and cubes. The mixture will start to become sticky and bind together. Add the water and gravy mix. It will be sticky at first. Just stir and bring to a simmer, and it is ready to serve.