soak the idly rice and maize / makka cholam for 4 hours

soak the urad dal and add with maize and grind as batter and allow to get fermented

finely chop the onion

in a pan heat the oil and temper the mustard, broken urad dal and bengal gram

add chopped onion and saute it until it get brown

transfer the onion into maize batter and add turmeric powder, finely chopped coriander leaves and curry leaves

mix well

heat the dosa tawa and pour and make a shape like dosa

once it get cook one side turn it and apply oil

now maize / makka cholam adai is ready to serve, serve with tomato chutney and coconut chutney