This atta can be made directly from the whole grains instead of using flours. Just wash the grain well with water and drain all the excess water. Dry the grains in the sun until they are nicely dry. Now grind them together to make multigrain atta from scratch.  Some people even sprout the grains before grinding. Sprouting the grains before grinding is the healthiest way to make multigrain atta. You can also roast the grains, except wheat to get a nice nutty aroma in the atta.