Cut your cassava into 3 inch pieces length wise (remove the top and end and discard) and using a pairing knife or potato peeler, remove the outer skin. cassava two ways – mashed cassava and cassava pie This recipe can be made simply as a mashed cassava (think mashed potato) with no cream. Please use the video below (at the bottom of the recipe) as a guide, especially for peeling the cassava. In the second level, milk can be added for a creamy mash, and in the third level, cheese is mixed in and also used to top the pie before baking. Add the tomatoes, onion, and garlic. Heat oil in an iron pot over medium-high heat. Cook and stir until tomatoes break down and onions are soft and translucent, 3 to 5 minutes.