Wash quinoa with water very well. Drain all the water and keep it aside. Now take all the lentils and methi seeds in a bowl and wash them.
Take a big bowl, add washed quinoa, lentils, oats, and 3 cups of water. Cover the bowl and let them soak for about 4 hours or overnight.
Take all the soaked ingredients along with green chili, ginger, curry leaves, and salt into a blender. Grind very well using little cold water at a time.
Let it rest for 1 hour. However, if you have less time, it is okay to use the batter right away. Heat a pan or nonstick griddle on medium heat.
Once the pan is hot, lower the heat and smear few drops of oil with a paper towel. Pour a ladle full of batter at the center and spread it in a circular motion into a thin dosa.