Peel and boil the cassava in a pot of water lightly salted, until tender
Drain and puree
Add the butter, parsley, milk and mix together
season with salt and let cool down to room temperature
Put two spoonfuls of the mixture int eh palm of your hand. Flatten it to place the cheese cube in the center and roll around it to make a ball.
Repeat until all the batter is used
Whisk the egg, and put the flour on a plate
Dip the balls into the egg then into the flour, shake off excess flour.
Chill for two hours in the refrigerator uncovered
Heat up the oil to medium high and fry until golden brown.
Drain excess oil on paper towel and serve immediately