Bloom the jelly
Pour the Chicken Stock into a small saucepan and warm it over medium heat until it is steaming hot but not vigorously boiling. Sprinkle the Powdered Gelatin evenly over the hot stock, then whisk until the gelatin is fully dissolved and the liquid looks completely smooth with no granules left.
Chill until firm
Pour the gelatin-stock mixture into a shallow container so it cools and sets faster. Cover it and refrigerate until completely firm, about 2 hours.
Cube the jelly
Turn the set jelly out onto a board if that is easiest, or cut it right in the container. Slice it into small, bite-sized cubes, then return the cubes to the refrigerator to stay cold while you prepare the filling.
Prep the aromatics
Trim and finely slice the Green Onion, keeping a little of the green part aside for garnish if you like. Peel and finely grate the Ginger (grated). Measure out the Soy Sauce, Sesame Oil, Sugar, and a small pinch of Salt (pinch), and set the Chili Oil nearby for serving later.
Mix the filling
Place the Ground Chicken in a medium mixing bowl. Add most of the sliced green onion, the grated ginger, soy sauce, sesame oil, sugar, and the pinch of salt. Mix vigorously with a spoon or your hand for 2 to 3 minutes, until the chicken mixture looks sticky, cohesive, and slightly tacky rather than loose.
Fold in jelly
Add the chilled jelly cubes to the seasoned chicken mixture and gently fold them in just until evenly distributed. Work carefully so the cubes stay distinct and do not mash into the meat.
Prepare wrappers and pan
Separate the Dumpling Wrappers and keep them covered with a lightly damp towel so they do not dry out. If they seem thick, roll them a little thinner so they will layer and steam more delicately. Line a large flat frying pan or skillet with 2 to 3 layers of parchment paper, leaving enough overhang to lift the finished lasagna out later, then lightly oil the top sheet so the wrappers will not stick.
Layer the lasagna
Lay a single layer of dumpling wrappers across the bottom of the lined pan, overlapping them slightly to make one continuous sheet. Spread a thin, even layer of the chicken filling over the wrappers. Continue alternating wrapper layers and filling layers until everything is used, finishing with a final layer of wrappers on top. Press down gently to compact the layers and smooth the surface so it cooks evenly.
Steam gently
Cover the assembled lasagna with another sheet of parchment or the pan lid, then add enough water to the pan around the parchment-lined lasagna to come about 1 to 1.5 cm up the sides. Keep the water level below the food itself. Set the pan over medium heat and bring the water to a gentle boil; once you see steady steam, lower the heat to medium-low and steam for 15 minutes, keeping the simmer gentle so the parchment stays in place and the layers cook evenly.
Rest and serve
Turn off the heat and let the lasagna rest, covered, for 5 minutes so the filling settles and finishes cooking gently. Lift it out carefully using the parchment overhang, let it stand for about a minute, then slice into portions. Serve warm with chili oil drizzled over the top and the reserved green onion scattered on for a fresh finish.
