Chicken wings: I remove the drummetts (use for another dish) but leave the wing tips. Using a small knife, separate the meat around the two bones (equivalent to the "ulna" and "radius", if you would like to know) and pull the skin and meat down to expose the joint. I grab the ends of the bones and rotate and wiggle until both come off the joint. Please take care not to cut or break the skin. Now you have created the pocket.
Gyoza stuffing: This is the usual pork stuffing for gyoza. I made much more than I intend to use for this dish so that I could make regular gyoza later. We happened to grow garlic chives in our herb garden, so I added that as well. As usual, I used the trimming from a pork tenderloin and, by using a chef's knife, chopped up finely into ground pork (probably 1 cup). I added chopped garlic chives (probably 3 tbs), blanched and finely chopped cabbage (4 tbs), finely chopped scallion (2 tbs), crushed garlic (1 fat clove), grated ginger (1 tsp), salt (1/2 tsp), black pepper (1/2 tsp), mirin (2 tbs), soy sauce (1 tbs), sesame oil (2-3 tbs) and knead by hand until it become nicely elastic and bound together.
Assembly and frying: Stuff the wing pocket with the gyoza mixture and close it by inserting a tooth pick through the skin at the opening. I shallow fry as usual rather than deep dry. At about 160F (I actually did not measure but used the stick-bamboo-chopsticks-in-oil method as usual) for 5-7 minutes turning several times. I took them out of the oil. I then cranked up the flame and, briefly, re-fried to make the skin crispy. I cut into the fattest one to make sure the pork is thoroughly cooked (which it was).
This dish is very good, although the skin was "oily" and could have been crispier. Since it is a type of sausage with a Japanese twist, it will go well with a cold beer but we had this with a red wine, Brookdale Cab Sauv from Napa, to counteract the effect of the fat.