Russian
Rinse a saucepan with cold water, pour in the milk and water and bring to a boil over medium heat.
Add the sugar and salt and reduce the heat to low.
Pour in the semolina in a thin stream while stirring constantly with a whisk so no lumps form.
Cook for 3 to 5 minutes, stirring all the time, until the porridge thickens.
Take the pan off the heat, cover and leave for 5 minutes; the porridge will thicken further.
Stir in half the butter, divide among bowls and top each with the rest of the butter.