Filo, also phyllo, or philo is a very, very thin pastry dough. Thin breads would be baked with walnuts and honey as a precursor to baklava. Some say filo was first made by the Turks and some say the Greeks.
The dough itself is usually made from flour, water, and oil or vinegar. It is very difficult to make as it needs to be stretched and worked with long rollers and it tears easily. These days it is easier to buy it frozen. You need to work with it quickly.
One ounce is about 85 calories and contains about 1.7 grams fat. Although that may seem low, when you are working with it, you usually layer it with butter which can add significantly to the amount of fat.
Here are a couple recipes: