To make these dumpling meatballs, start by preparing the sauce. Add the peanut butter, soy sauce, maple syrup, rice vinegar, garlic, and sriracha to a small blender. Blend until completely smooth, adding a splash of water if needed to thin. Transfer the sauce to a bowl and set aside.
Next, make the meatballs. In a large mixing bowl, combine the ground chicken, green onions, cilantro, ginger, garlic, sesame oil, fish sauce, bread crumbs, egg, salt, and pepper.
Use your hands to mix until everything is evenly combined. Roll the mixture into 24 large meatballs. You can make them bigger or smaller, depending on your preference.
If the mixture feels sticky, lightly wet the palms of your hands to make rolling easier.
Now, cook the meatballs. If using an air fryer, place the meatballs in the basket in a single layer and cook at 400°F for 12 minutes, working in batches if needed.
If baking, line a sheet pan with parchment paper and bake at 400°F for 25-30 minutes, or until the meatballs reach an internal temperature of 165°F.
While the meatballs cook, prepare the pickled cucumbers and onions. Thinly slice the cucumbers and red onion, then toss them together in a bowl with the rice vinegar and a pinch of salt. Set aside to quick-pickle.
Once the meatballs are ready, serve them over rice or grains of choice. Top with the creamy peanut sauce and add the pickled cucumbers and onions on the side.