Cook popcorn chicken according to package directions.
Prepare the glaze while chicken is cooking. Over medium heat sauté the garlic in butter for about a minute in a large skillet. Stir in soy sauce, brown sugar, honey, and red chili pepper flakes, ginger powder and water.
Bring to a boil, whisking regularly. Reduce heat and let simmer for about 5 minutes until glaze thickens slightly. Toss cooked popcorn chicken in glaze. This is easiest to do right in the skillet.
Serve glazed chicken over rice (optional) and garnish with sliced green onion.