Soak rice and quinoa together for at least 3-4 hours.
Rinse well and grind until smooth. Sprinkle water as and when it sticks to the sides, but sprinkle and add. Do not add more. Takes 30-40 minutes for grinding.
Soak urad dal and fenugreek seeds together for 2 hours, rinse well and grind to a smooth batter. I used my grinder which works best but you can do in mixie too. It takes around 30 minutes.
Transfer both the batters to a tall container big enough to hold the batter after fermentation. Add salt to it. Mix well.
Close with lid and set aside for 8 hours for fermenting. Mix well. The batter will be thick.
Grease your idli plates with oil, take a ladle full of the batter and pour into the mould.
Steam cook for 10 minutes or until a spoon or inserted inserted into the idlis comes out clean with sticking. Then its done. Switch off. Remove the idli plates, dip a spoon in water.
Using the spoon remove the idlis. Transfer to hot box.
Serve Quinoa Idli hot with chutney and sambar!