In our stores, cilantro is sold in bunches like parsley. If you only need part of the bunch, just cut (1/4-1/2-whatever) of the bunch right above the twist-tie or rubberband that holds the bunch together. Rinse it in a bowl of water,
pick out any bad bits including looking for any stray grass or weeds that may have gotten picked with the cilantro,
rinse out of the water,
drain,
chop.
If you need a lot, I cut the bunch right above the twist-tie/band, rinse in a large bowl, drain, rinse again, drain, chop.
Sometimes, the cilantro in our stores can be really muddy. Plopping the whole lot in a large bowl of water and swishing around a bit allows the dirt to settle. Sometimes those batches need 2 or 3 rinses to get rid of all the dirt.
After that, chop up stems and all!
[Sometimes, the cilantro does have some stems that have gone to seed, and in that case I discard them. Usually the stems are more tender than parsley, but when going to seed, they get more fibrous.]
LOVE cilantro!
Cooking Secret- how to dry greens and keep them fresh-
trim, chop, rinse and drain greens
lay out on a clean towel (dish towel for a small amount, bath towel for a large amount)
Roll up towel
You can then put the towel in a plastic bag (but don't seal bag tight! just fold it over) and put it in the refer. It will stay fresh and not get brown for 2-3 days! It's a great way to prep salad ahead and keep it from getting brown.
If you want to use the salad/greens right away, just set the rolled up towel to the side and rotate it a couple times for the water to drain out to the towel.
hope it helps-