Preheat the oven to fan-assisted 160C / 180C / 350F / gas 4.
Combine the grated cassava, condensed milk, evaporated milk, eggs, butter, sugar, cheese and coconut milk in a mixing bowl and mix until combined.
Grease the baking tray, then pour-in the cassava cake batter.
Bake the cassava cake for 1 hr. Remove from the oven and set aside.
Meanwhile, prepare the topping by combining the sugar, flour and condensed milk in a saucepan and mix thoroughly.
Add the cheese while stirring constantly.
Pour the coconut milk and stir constantly for 8-10 mins
Pour the topping over the cassava cake (baked batter) and spread evenly.
Grill / Broil the Cassava cake until colour turns light brown.
Garnish with grated cheese and serve.