Miodownik z kaszą manną

Ingredients for the cream:
1 liter of milk
13 tablespoons of semolina
3/4 cup of sugar (or more, to taste)
1 stick of margarine or butter
Cream preparation:

Bring the milk to a boil and add sugar and semolina, stirring constantly to prevent lumps.
Cook until the mixture thickens.
Add butter or margarine and mix well until smooth.