1: Whisk together the milk, cinnamon sticks, lemon peel, and erythritol in a pot.
2: Heat the mixture until it simmers.
3: Soak the Torrija bread in the milk mixture until softened.
4: Beat the egg in a bowl.
5: Dip the soaked bread in the egg and cook on a skillet until golden.
6: Sprinkle with ground cinnamon before serving.
