In a saucepan, heat the milk over medium heat. Mix the eggs in a bowl and add them to the saucepan with the milk, and stir. Gradually add the flour, stirring so as not to become lumpy. Add the vanilla and sugar. Keep stirring. Once it thickens, take it down from the fire.
Oil a baking pan. Lay 4-5 pastry sheets, smearing a little oil on each one.
Spread the stuffing evenly all over. Fold the edges and smear a little oil on top. Sprinkle a little cinnamon.
Bake at 180°C with extra heat on the oven elements for 1 hr.
Leave it to cool down and serve.