Take the beans and sort them out to remove all the stones and other unwanted materials.

Wash the beans twice. Then put to boil in a jiko for almost 3 hours. This should be until soft.

After 3 hours put oil in a pan. Add in onions and fry until soft. Add tomatoes. Stir really well. Ensure that the tomatoes become soft.

Add in the boiled beans and stir. Dissolve royco in 25 mls of water and add to the boiled beans.

Boil for 10 minutes then serve.