Peel cassava and cut in half to remove the root. Clean well

Put in a sufuria with water and a little salt. Boil until tender but firm

In another sufuria fry onions and garlic till brown

Add tomatoes and cook till tender. Add tomato paste and cook for two minutes stirring so it doesn't stick or burn. If you wish to add beef you can add it at this stage after boiling it

Add a little water or you can use the one you boiled cassava in. Simmer two minutes