Here is the secret method of cooking perfect gyoza (fried dumplings).
The dumplings won't stick to each other and are easy to separate without
damaging the dumpling skin. Plus, the meat inside will be thoroughly
cooked!
Put some cooking oil into a frying pan and spread oil
to cover the entire surface of the pan. You don't need a lot of oil to
do this.
Turn on the stove (use medium heat). When the pan is hot, place
dumplings on the frying pan. When the underneath skin turns into
beautiful foxy color, put water into the pan. Note: the amount of water
is important. Put water until it reaches the half way up of each
dumpling.
Cover the pan with a lid. When the water boils (bubbles pop out),
throw away all the boiling water. Note: if you let all the boiling water
evaporate, then all the dumplings will stick together.
Place the pan back to the stove and cook for a few seconds/minutes
till the underneath skin turns dry and gold brown again. Take one and
taste it. Just double check and see if the meat inside is cooked.