Get the sauce out of the way: Combine ingredients (except for cornstarch and orange zest) in a saucepan on medium heat until the sugar is dissolved. Stir in cornstarch and zest last then remove from heat.
For the dumpling filling: chop boy choy, shiitakes, chives and carrots into very small pieces. Using a microplane grater, shave garlic, ginger, and orange zest into the vegetables and mix together. Warm sesame oil over medium heat in a pot or sauté pan. Add vegetable mixture and the tamari and stir to soften for no more than 5 minutes. The veggies should be vibrant and al dente.
Assemble the dumplings by placing one sheet on a flat surface. With a bowl of water near your dominant hand, dip a finger or two in the water and wet the perimeter of the dumpling so when you fold it all up it will stick together. Place 1 heaping tablespoon of cooked filling in the center and fold together by adjoining the two opposite corners with a pinch and then repeating with the remaining corners, sealing the edges together as you go like a present. If your wonton wrappers are circular, you can see detailed instructions on how to assemble here. Repeat until all filling has been used.
Prepare your steaming mechanism (pot with steamer lined with bok choy or lettuce, ghetto white girl style like moi… or by using a real-deal bamboo steamer as seen here). When there is sufficient steam generated, place as many dumplings as you can fit without touching one another. Cook for 5-8 minutes.