In a large pot, bring the water to a boil. Add a pinch of salt.
Gradually whisk in the cornmeal, stirring continuously to prevent lumps.
Reduce the heat to low and cook, stirring frequently, until the mixture thickens and the cornmeal is tender, about 20-30 minutes.
Stir in the milk and butter until well combined and the mixture is smooth.
Add the grated cheese and stir until it melts and is evenly distributed.
Spoon the Kačamak onto plates and serve hot. It can be enjoyed on its own or as a side dish with meat or vegetables.
Enjoy your meal!