Cut pumpkin into very fine pieces . Soak Aval for 1/2 hour. Squeeze out the water and keep aside. Grind green chillis , salt and asafoetida adding minimum water. Mix everything . Heat 2 tsp rice flour add 1 cup water and heat until it becomes like a thin sauce. You may use 1 tsp sago instead of rice flour. Add this paste to the mixed flour and mix well. Adding this paste will ensure that the vadams are easy to keep on the plastic paper. In an open space spread a large sheet of plastic paper. Make the above flour into small balls. Do not press too much but gently drop it onto the plastic sheet one by one until the entire flour is emptied. Ensure that the balls do not touch each other. Leave it to dry for 3 days. Use onions/plaintain flower instead of pumpkin if preferred .