Question: how to prepare luyang dilaw?
Answer: After washing, cut them into small pieces, maybe just 2-3 pieces so it's easier to press it with the flat side of a knife, and put them in an aluminum pot. No need to grind it. ... 
Once pressed, pour about 750mL of water. ... 
Let it boil in medium heat. ... 
Ready to drink! ... 
Try it and tell me if it worked for you.