Combine urad flour, rice flour, sesame seeds, red chili powder, ground cumin and salt. Whisk well.
Add the melted ghee and just enough water to make a smooth dough.
Heat enough oil in a pan for deep frying the janthikalu/ murukku. Lightly spray and get the murukku mold ready.
When the oil is hot enough, take a piece of the dough and place in the mold, press it directly into the hot oil and fry for 2~3 minutes on medium flame until the murukku is golden brown on one side. Gently flip and fry for another 1~2 minutes on the second side.
Remove with a slotted spoon onto a paper towel lined plate. Repeat with the remaining dough. Store the janthikalu/ murukku in an airtight container for 1~2 weeks.