Wash the raw rice nicely till the water becomes clean.
Wash methi seeds along with the rice.
Pour half cup of sour curd and enough water and soak it for 6 - 7 hours.
Grind the mixture along with turmeric powder and grated jaggery and keep it overnight.
:- See that there is enough space for the batter to rise as the curd makes the batter ferment nicely.
The next morning, stir the batter nicely.
:- If it is too thick, you can loosen it by adding little water. Check if the sweet and sour consistency is ok. If you want it more sweet, add a little sugar.
Heat an appam chatti and make dosas just like you make velleppam.