I did't eat my popara with sugar, my grandma put me chocolate powder on top instead. And because she was a diabetic, she didn't put any sugar in her popara.
In that time, the milk she used was brought by a farmer, 2 or 3 times a week. She kept these 3 wide neck glass bottles specially for milk, and she exchanged the empty ones for full. The taste of the milk today can never compete with the milk I drank when I was a child.
So, to make popara is quite easy. Warm some milk in a coffee pot, break 2 or 3 pieces of bread in a dip plate and pour over the warm milk. Add some sugar or chocolate powder on top. Wait 1-2 minutes so the bread can soak the milk.