Using a cheese cloth or kitchen cloth , squeeze the grated cassava. It should be dry with very little moisture. Set aside.
Mash overly ripe bananas with a potato masher, spoon or place in a food processor or blender until puree.
In a medium bowl, add cassava, salt and mashed bananas- mix well. Mixture should be firm enough to roll into balls.
Using your hands roll about a tablespoon of mixture in the palm of your hand into little bite size balls.
Heat oil ( about 3 inches deep) to 375 degrees in a skillet or saucepan.You may also use the oil test by dropping a 1 inch square of bread into the oil. If it takes 60 seconds to brown, then the oil is at 365. Gently place cassava balls in hot oil and fry until golden brown .