What is the best way (force/position/type of cinnamon) to grate cinnamon sticks using a microplane? I've tried several times, and although I get a finely ground, very aromatic powder, it took me five minutes to get a quarter of a teaspoon--and took serious elbow grease/constant repositioning. Is there any way to grate cinnamon more efficiently? Is it dependent on the type of cinnamon stick?
I think using a microplane to grate hard spice is only useful for small amount, either it will take you a long time (as you experienced) or will damage your microplane (render it blunt).
The best way to grind spices is with a electric grinder (coffee grinder), even with that, grinding harder spices like cinnamon is difficult.