Wash & soak rice, urad dal in water for 4-5 hours.
Drain & grind to a smooth paste with enough water.

Cover & set aside overnight to ferment.
Next day, heat oil in a small pan, add mustard seeds, cumin seeds, green chilies and curry leaves. After mustard and cumin seeds crackle add this to the fermented batter.

Add salt, little water if required, mix & form a thick batter. Now add all the chopped vegetables and mix well.
Heat appe mould on a medium flame & grease it with a little oil. Pour a spoonful of batter in each appe mould.

Cook till outer surface becomes golden brown & then turn each appe upside down using a fork & cook other side.

Remove & repeat same with remaining batter.
Serve hot rice appe with coconut chutney, groundnut chutney or tomato sauce.