Measure and soak sago in curd at least for 6 hrs. I soaked it overnight. Morning when you see the sago pearls will be soft.
Now in a mixing bowl - add rice flour, red chilli powder, sago, jeera, butter, hing.
Mix it well with your hands, then add water little by little. Gather together to form a non sticky dough.
Shape it into a log and keep it ready.
Fix your thenkuzhal murukku mould and fill the murukku press with the dough.
Now, in parallel heat oil. When oil is hot, drop a pinch of batter to check it comes up immediately, then oil is at the correct temperature. Squeeze in a spreaded manner, do not crowd.
Fry till golden and until shh sound ceases. It will stick together just break it while frying. You can break it after frying.
Drain in tissue paper. Once it cools down, break it and set aside.
Serve Sago Murukku with tea!