Make the chicken patties: Combine ground chicken, panko, egg, green onions, garlic, ginger, pepper, and onion powder. Form into 4 burger patties. Heat a nonstick skillet with a light coating of olive oil. Cook patties approximately 5-6 minutes per side, depending on thickness, until the center. reaches 165°.
Make the homemade teriyaki glaze: Combine soy sauce, water, honey, vinegar, ginger, and garlic in a small saucepan. Simmer gently for 2-3 minutes. Mix cornstarch with cold water. Stir slurry into sauce and simmer until glossy and slightly thickened. Glaze those burgers! Brush or spoon the glaze over your cooked chicken patties. Let them simmer in the glaze for another minute or two, turning to coat.
Caramelize the pineapple: Using the same skillet, cook pineapple chunks until lightly golden. No sugar necessary! (You can leave the pineapple whole).