Heat the pan again adding all the seasoning ingredients in the order mentioned. As the mustard seeds crackle add chopped onions and saute. When the onions turn translucent include grated carrot and stir till the raw smell subsides.
In a wide bowl add powdered oats, rice flour, yogurt, salt, baking soda, sauteed onions plus carrot. Combine everything well and adding water little by little make a batter of dosa batter consistency. I have added chopped coriander leaves and fresh grated coconut too.
Next, heat appa pan (paniyaram pan), grease with oil and pour the batter in to each depression. Cook covered for few minutes. When it gets cooked from top, turn it over using spoon and cook other side too.
Remove them from pan and relish it with chutney and sambar. It can be a good breakfast or evening snack too.