In a wide bowl add rice flour, urad dal flour, cumin, butter, and salt. Mix all the ingredients thoroughly with fingers for a couple of minutes. There should be no lumps in between.
Add water and mix it to a stiff dough.
Heat oil in a thick bottom pan.
Take the mold and grease it with a little oil.
Take a ball of dough, knead with a little water and roll it. The mold has small detachable plates with perforations. Use the plate with three or four perforations.
Once the oil is hot, press directly into the oil in the shape of a coil.
Deep fry on low to medium heat.
Take a ladle and toss in between. Once the tengalu looks crisp, remove on a plate with tissue paper.
Repeat for the rest of the dough.
Store in an air-tight container.
Notes
To make the urad dal flour at home, dry roast the urad dal until golden in color. Let cool and then grind it.
Butter should be at room temperature
The quantity of oil should be adequate.
Use fresh ingredients to make a snack.
Make a small batch of them if you are new to making these kinds of snacks. You can again make it.