In a bowl grate the eggs, cheeses, milk and add the freshly ground pepper. Take a large baking pan and grease with a little olive oil. Place 2 of the filo pastry sheets on the baking pan after drizzling a few drops of olive oil between them, put 2 more filo. Pour half of the cheese mixture and continue with the same pattern until the ingredients are exhausted. Cover the pie with the last filo pastry sheet and drizzle it with a little olive oil and engrave the surface of pie.