In a large saucepan, place potatoes, 1 teaspoon salt, and water to cover. Bring to a boil. Reduce heat, and simmer until fork-tender. Drain, peel, and cut potatoes into 1/4-inch pieces.Advertisement
Heat oil in a large skillet over medium heat. Add mustard seeds, chana dal, cashews, ginger, garlic, onions and curry leaves. Saute until onions are soft, 3 to 4 minutes. Add curry powder, chile powder, turmeric, and ground coriander. Cook for 1 minute. Add peas and potatoes. Add 2 tablespoons water, and cook until heated through. Season with salt, and add chopped coriander. Use as a filling for dosa.