Ingredients:

Elephant yam (Chena) 500 gm
Cucumber (Vellarika) 500 gm
Carrot   100 gm
Raw banana   1
Drumstick    2
Snake gourd (Padavalanga) 50 gm 

Salt As required
Coconut   ½ cup
Shallot   4
Green chilly   2
Chilly powder  1 teaspoon
Turmeric powder  ½ teaspoon
Cumin powder  ¼ teaspoon
Curd   2 tablespoon
Curry leaves  2 stem
Coconut oil   1 tablespoon

How To ?

Wash all the vegetables and cut into 2 inch long pieces. 
Add required water and salt and cook.
Grind ingredients 3 coarsely. 
Add this to the cooked vegetables.
When cooked properly add curd and curry leaves and mix well. 
Add coconut oil and remove from fire.