Melt the butter in a saucepan. Stir in the pine nuts and semolina, and cook until lightly browned. Reduce the heat and add the milk. Mix well, cover the pan with a dry cloth, press the lid down tightly, instantly pull the towel flaps up over the lid and simmer until the milk is absorbed. Then stir in the sugar until it has dissolved. Cover again with cloth and lid, remove f