Boil 7 1/2 cups (1.8 L) water with the milk, oil, salt and pour in the flour, while constantly stirring.
While boiling, beat it with a whisk for 10 min.
Heat the butter in a pan and pour the paprika over it. Stir.
Distribute the kachamak in plates and sprinkle with crumbled feta cheese. Pour the spiced butter over it.