Heat ghee in a large pot. Add cumin, coriander, ginger, garlic & onion & stir-fry for 1 minute. Add turmeric, garam masala, chili powder, minced red chili & bay leaves. Mix well & stir-fry for another minute. Add vegetables, potatoes & tomatoes. Mix well & cook for another 5 minutes. Add water & bring to a boil. Add remaining ingredients. Serve hot over boiled rice. Adapted from Betty Jung, "The Kopan Cookbook"