In a small pan over low medium heat add 1 teaspoon of oil with millet flour and dry roast for about 2 minutes, the flour will have a light aroma, turn off the heat, and remove roasted flour from pan. Note: millet flour should be at room temperature before adding to yogurt.
Take yogurt in a bowl and add the water slowly to make lump free batter.
Heat 1 teaspoon of oil in a saucepan over low medium heat, oil should be moderately hot add mustard seed and cumin seeds as seeds crack add turmeric, curry leaves, ginger and cilantro and stir.
Add yogurt mix, keep stirring till it comes to a boil. Lower the heat and add millet flour, stir making sure no lumps. Let it boil for about five minutes stir occasionally.
Add salt, black pepper and green chilies, let it cook for 2-3 minutes.
Serve Millet Soup hot.