Plantain stem is a high fiber content vegetable and is also good for people with diabetes, high cholesterol and kidney stone.
https://www.archanaskitchen.com/vaazaithandu-lemon-rasam-recipe-plantain-stem-lemon-rasam
https://www.archanaskitchen.com/vaazaithandu-lemon-rasam-recipe-plantain-stem-lemon-rasam