Soak the split peas in hot water for 1 hour & drain. Wash the Mung beans well & pick out any loose stones & sticks, etc.
Combine rice, legumes, ghee, turmeric, asafetida, chili, ginger root, vegetables & stock in large pot. Cook for about one hour.
Blend the vegetables at high speed to make a very creamy & smooth soup & return to the pot.
Sprinkle in the ground coriander, cumin & garam masala. Heat till almost boiling & simmer gently for 2 to 3 minutes, stirring to prevent burning.
Add the black pepper, salt & minced coriander & serve.
Yamuna Devi, "The Art of Indian Vegetarian Cooking"