Lemongrass is a fragrant herb found in many Asian dishes. Although you can find lemongrass paste or minced lemongrass at the store, it's pretty easy to prepare it yourself.
Peel the outer leaves of the lemongrass to reveal the yellow green leaves beneath. Discard any leaves that are dry.
Slice off about 1/2 inch bottom portion of the lemongrass stalk.
Cut off the tougher green portion of the lemongrass stalk. Use the more tender yellow portion to mince.
Slice the bottom portion in half lengthwise and lay flat on the cutting board. Taking your sharp knife, thinly slice the lemongrass.
Run your knife over the lemongrass several times until it's finely minced. Nobody likes long pieces of lemongrass stuck in their teeth so you'll need to run it over several times.
Notes
When choosing lemongrass at the store, try to choose stalks that aren't wilted or too dried up.
You can find lemongrass paste or frozen minced lemongrass at the store. It's a fine alternative if you can't find it fresh.
Lemongrass keeps well in the freezer. Mince them up yourself and freeze up to 6 months.
If you have lots of lemongrass, you can try using a food processor to mince it faster.