Another option for a soup dumpling would be a Pot Sticker recipe.

On occasion, I'll do this with a chicken broth, throw in some odd, and
end veggies (Pea pods, Bean Sprouts, Spinach, Scallions, and drop a few
Pot Stickers in for a more filling soup.

One could bypass the hassle of making them from scratch, and buy them
frozen.

The Wal Mart where I'm at carry the Ling Ling Pot Stickers in the bag
(pork, or chicken) and they're pretty good, and can be used in a soup.
Mark