Put the rice in a blender or food processor and process to make a thick, grainy paste.
Transfer the paste to a bowl, add enough water to cover and soak overnight.
Put the urad dal in a separate bowl, pour in enough water to cover and soak overnight.
The next day, drain the urad dal and transfer to a blender or food processor.
Add the fenugreek seeds and process to make a fine paste.
Mix the 2 pastes together and allow the mixture to stand overnight. Season with salt.
Heat a large, non-stick frying pan (skillet) or a large, flat Tawa or griddle over medium heat.
Pour 1 ladleful of the batter into the centre of the pan and spread it out in a circular motion with the back of the ladle to a thin layer.
Cook for about 2 minutes, or until dry, then spread some ghee or oil in the centre and along the sides and cook for a further 2 minutes, or until the dosa is golden brown and crisp.
Roll it up and transfer to a serving plate. The dosas must be served hot with Coconut Chutney and piping hot Sambhar.
Make the others in the same way.