In a mixing bowl, combine rice flour and butter. Mix thoroughly, and then use your hands to rub the butter into the rice flour until the texture becomes crumbly and binds together.
Next, add cumin seeds, white sesame seeds, soaked moong dal, green chili paste, ginger paste, chopped curry leaves, and salt. Mix everything together.
Gradually add 2 cups of slightly hot water and knead the mixture into a smooth, semi-soft dough for making papdi.
Take a plastic sheet or a zip-top bag and grease it with oil.
Place small, ball-sized portions of the dough onto the greased surface. Flatten them using a bowl or cup. Repeat this process for all the papdi.
Carefully place the papdi into hot oil, ensuring the flame is set to medium heat. Do not fry the papdi on low heat.
Fry the papdi on both sides over medium heat until they turn golden and crisp.
Remove the fried papdi and place them on a wire rack to allow excess oil to drain off.
Finally, store the rice papdi in an airtight container and enjoy them for up to 1-2 months.