Clean and chop the banana stem in to small pieces and soak in butter milk or in water with turmeric.
Transfer half of it to food processor.
Add 1 cup water and grind it in 2 to 3 intervals. Strain the water nicely and collect in a bowl.
Also mix cornflour and 1/4 cup milk together and keep aside.
In a pan, add butter or olive oil.
Add cumin seeds and fry for a min.
Add the chopped remaining 1 cup banana stem and fry for a while.
To this add 1tsp of ginger garlic paste.
Add salt as per taste and saute for 4 to 5 min.
Add the filtered banana stem juice and cook for 8 to 10 min or until it gets cooked nicely.
Check if the banana stem is cooked or not.
Now add the corn flour and milk mixture. Allow to boil for 3 to 4 min.
Add pepper and salt as per your taste.
Healthy and tasty banana stem | Vaazhaithandu Soup is ready.
Serve it hot.