Fried : heat a pan to med-high, add 2 tbsp oil, add the dumplings (don't crowd them). Fry the bottom until light golden brown, add 1/4 cup of water and immediately cover with a lid. Allow to steam until all the water is gone, approx 7 minutes. Remove cover and let cook until pan is completely dry and bottoms are crispy.
Fried 2 : Pan fry in 2 tbsp oil until golden brown. Flip and cook until the other side is golden brown.
Boiled : (home-made wrappers are better for this) Drop dumplings into lightly boiling water (not a hard boil). Cook for 6-8 minutes, depending on size. When they float to the top, boil for 1 more minute or until they become a little transparent. Overcooking will make them fall apart.
Steamed : Cover each rack with parchment paper that has holes in it to let steam through. Boil the water, reduce to medium heat to keep the steam going, place the steamer on top of the pot, and cook for 8-10 minutes.