Shred Potatoes and Onion, and roughly chop leek. Mix, then add black pepper, Vegetable Seasoning and salt to taste. Add 1 tsp. Olive oil and mix everything again (It makes about 2 1/2 cups).
Preheat oven on 400F (200C).
Heat skillet and add a drizzle of oil, saute potatoes, onions and leek mixture for 5-6 minutes, on medium high heat. Stir constantly, so it doesn't burn, and the mixture is halfway cooked.
If filo sheets are thawed, then take two sheets at a time (cover the rest with the kitchen towel while working). Add about 2 tablespoons - try to be more in the middle. (See pic.)
Oil the baking pan, it can be rectangular baking pan too.
Bake for 30-35 minutes or until the dough is golden brown.
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