Place the pot on low heat with one heaped teaspoon of coffee per cupful of water and sugar to taste. Heat slowly, stirring gently until the sugar dissolves. When the coffee begins to froth up remove from the heat, pour a little of the froth into each cup and return to the heat. Let the coffee rise once more, but without letting it come to the boil, and serve. Do not stir after serving otherwise you will disturb the sediment and the coffee will taste gritty.