In a large bowl, add rice, Masoor dal, Moong dal, urdh dal, chana dal, toor dal, and methi seeds. Rinse 4 to 5 times and drain the water.
Add dry red chillies, and freshwater. Cover and soak for 5 hours.
Transfer the soaked lentils and red chillies to a blender.
Add jeera, ginger slices, and water. Blend slightly coarse and transfer the batter to a bowl.
Add hing, salt, and mix well. Dosa batter is ready and needs no fermentation.
Heat a griddle or iron tawa on medium-high heat and spread some oil in a circular motion ( I use a fork and an onion halved in half to spread the oil. I have seen my grandmother and my mom using this method on cast iron tawa for decades to avoid sticking).
Gently pour 1 ladle of batter and thinly spread.
Sprinkle some oil. Using a stainless steel spatula, flip the dosa when holes ( air pockets) are formed. After a few seconds flip again.
Serve thin, crispy, and hot mixed lentil dosa with chutney and sambar. Enjoy!