Preheat the oven to 450° F.
Salt and pepper the chicken wings or thigh pieces.
In a large cast iron or skillet, heat the oil over high heat. Add the chicken wings or thighs in two batches, frying and browning on all sides, 2-3 minutes total. Remove the first batch to a bowl and set aside. Continue with the second batch.
Add the first batch of chicken wings back in, the pineapple pieces, and the fresh ginger cubes. Saute for a minute or two.
Pour ¾ of the Gluten Free Teriyaki Sauce into the pan, reserving the ¼ for later. Stir the chicken wings or thighs and coat in the sauce.
Spoon the wings or thighs and pineapple to the foil lined tray. Bake for 18-25 minutes until browned and 170-185 internal temperature.
While the chicken in baking heat the remaining sauce to thicken slightly. Pour into a ramekin or or small bowl to use for dipping or spoon over teriyaki rice bowls.
Remove the chicken from the oven.
Spoon into individual dishes or bowls or into a serving dish and top with cilantro or green onion slices.