
Boil the syrup. Carefully remove the zest from the orange, chop it finely, place it in a saucepan and fill it with water. Add 3 tablespoons of sugar and cook over medium heat for 10 minutes, stirring constantly.

In a deep bowl, squeeze the juice out of the orange and lemon using a masher. Pour it into a glass, add starch and stir. Pour the syrup into another glass and transfer the cooked zest to the pulp. Grind the pulp using a blender.

Prepare the filling. Pour the syrup and juice with starch into a saucepan, add the pulp and the remaining sugar. Mix thoroughly and cook until thickened, stirring constantly. Let the filling cool.

Roll the strudel. Roll the dough into a thin rectangular sheet and spread the filling evenly over it. Carefully roll the strudel into a roll, pinching the edges.

Bake the strudel. Place the roll on a baking tray and bake in an oven preheated to 180 degrees for 20-30 minutes.