Place the chicken into a medium mixing bowl, add the marinade ingredients to the bowl and stir to combine. Set aside to marinate while you prepare the sauce.
In a small bowl, combine the sweet sauce ingredients; set aside. In a medium bowl, combine the cornstarch, ½ teaspoon granulated garlic, and 1 teaspoon pepper. Whisk the eggs with ½ teaspoon ground black pepper and ½ teaspoon granulated garlic in a medium bowl.
In a 14-inch wok over medium/medium-high heat, heat the oil until shimmering. Then, working in batches, dredge the chicken in the egg mixture, and let the excess drip back into the bowl. Finally, coat in the flour and cornstarch mixture, be sure to press it and move it around so that it’s thoroughly coated; shake off excess.
Then, add the chicken pieces in a single layer - it’s okay if some pieces are touching. Cook, undisturbed, for 4 to 5 minutes, until the chicken turns brown and crisp. Watch carefully and reduce the heat if the chicken starts to burn. Flip the pieces and continue cooking until the chicken is golden on all sides and cooked through to an internal temperature of 165 degrees, 3 to 5 minutes. (Thicker pieces of chicken may take a bit longer). Remove the Sweet Hawaiian chicken from the oil to a paper towel to drain.
Once finished frying the Sweet Hawaiian chicken, clean the wok with a paper towel using a kitchen tong and add a little more oil over medium heat. When the oil is hot, add the chiles to saute for around 1 minute. Next, add the garlic and ginger and cook stirring until it releases its fragrance, about 1 minute or so. Next, add the onion and bell pepper to the wok and saute for 2 – 3 minutes, or until tender-crisp.
Again, mix well the sweet sauce mixture to dissolve the cornstarch, then gently pour into the wok, and bring it to a boil, cook stirring, until the sauce thickens, about 3 minutes. Add the chicken back to the wok and the pineapple chunks and toss everything together until thoroughly combined with the sauce, about 1 minute. Taste and adjust salt and pepper if needed. Garnish with sesame seeds or chopped green onion, if desired. Serve the Sweet Hawaiian Chicken with white rice and Chinese cucumber salad.