In a blender, place the eggs, the oil, the milk, the mozzarella cheese and a pinch of salt, let it blend for 2 minutes.
Transfer this mixture to a bowl and add the sweet manioc starch. Mix it all together very well until combined. Add 1 very full tablespoon of baking powder and mix well.
Grease a ring cake pan with butter and pour the batter in it.
Sprinkle grated cheese all over it, to taste.
Bake in a preheated oven at 200°C (392°F) for 30 to 40 minutes. Baking time may vary depending on the power of your oven.
Run a knife along the edges of the pan to unmold.
Unmold and serve.