Grind leftover rice ,cummin seeds ,Chilli and ginger in a mixer .
To the rice mixture add rice flour and salt to taste
Mix well till it binds together
Divide rice mixture into four balls
Dab the rice ball with rice flour and roll with a Rolling pin
Heat tawa on a medium flame
Transfer the uncooked rice roti to the tawa carefully
Drizzle oil and cook for few minutes on both the .Garnish with coriander leaves
Serve Leftover Rice roti with any pickle, chutney or tomato sauce.