To make the pastry, heap the flour on a board and make a well in the center. Mix in the egg, sugar and salt. Add the melted butter and enough water to form a smooth dough.

Cover with a heated bowl and let dough rest for 20 minutes. Then work it again, slapping it down on the board to make it more elastic. Gather dough up into a ball.

Roll dough out on a floured cloth with a floured rolling pin, making it as thin as possible. Brush the sheet with olive oil. spread evenly with apples; scatter the cinnamon, almonds, raisins and orange rind on top. Spoon the jell over and sprinkle with powdered sugar.

Preheat oven to 350°:F. Carefully roll up the strudel, removing the cloth as you go, and flatten at each end so that the filling will not come out during baking. Butter a large baking sheet and slide the strudel onto it. Bake until golden brown, about 1 hour. Transfer the strudel to a plate, sift the remaining sugar over it and serve.