Dry roast the oats in high flame for five minutes. Stir continuously, else it might burn.
To this sprinkle water (1/2 cup) little by little and stir well with your hands. The whole oats should be wet.
Put the wet oats to a blender and just give it a quick blend so that it becomes smooth oats puttu podi.
To the puttu maker first add little coconut(1/2 cup), then put two handfuls of oats powder and then layer again with coconut. Repeat the same process upto top of the puttu maker. Attach the puttu maker to the puttu vessel and steam. Once steam starts to come from the top of the puttu maker keep on flame for five 5 more minutes and then switch off the flame.