1. Cook the veggies with some salt and water until done.
2. You could even pressure cook them if you want.
3. For the masala, grind all the ingredients to a smooth paste with some water.
4. Cashews are added to give thickness to the gravy.
5. Heat oil in a heavy bottomed pan;
6. Temper with mustard seeds, hing, turmeric, curry leaves.
7. Add finely chopped onions and fry until done;
8. Add cooked veggies and the masala paste.
9. Mix and allow it to boil well; Add salt as required. Add water to get the desired consistency.
10. Remove from stove and serve hot with pooris, dosa, chapati or even rice.

Courtesy: http://maneadige.blogspot.com/