Mix both rice and urud dhal and grind them to powder.
Add two spoon s of Zeera, a few pinches of Hing,( about 1/8 tsp) and salt to taste.
Mix well. Add a laddle of hot oil or Hot vanaspathi and mix well.
Add water little by little and mix till a dough is formed.
Beat the dought well till is is well mixed and medium soft.
Try the flow through a hand chakli Press. It should flow with medium pressure.
Use a shaping plate having 3 round holes about 2 mm dia. The shape of the thengol is round in section and haphazard shape ( not a regular shape like a spiral)
Heat oil in a wide frying pan.
Load the press with enough dough and squeeze on a lightly oiled plate to required shape and size. 2 to 3 pieces can be squeezed from one filling of the dough. Transfer these to hot oil and fry till done. (Starts to turn light brown)
Remove from pan and store.