01 - Combine the diced fresh pineapple or drained canned pineapple with pineapple juice in a blender or food processor. Process until a smooth puree is achieved.
02 - Transfer the pineapple puree to a small saucepan. Add the low-sodium soy sauce, rice vinegar, brown sugar, honey, minced garlic, grated ginger, sesame oil, and optional crushed red pepper flakes. Stir thoroughly to combine all ingredients.
03 - Place the saucepan over medium heat and bring the mixture to a gentle simmer, stirring frequently. Allow it to simmer for 3 to 5 minutes to allow the flavors to meld.
04 - In a separate small bowl, whisk together the cornstarch and cold water until a smooth, lump-free slurry forms.
05 - Gradually stir the cornstarch slurry into the simmering sauce. Continue to simmer, stirring constantly, until the sauce has thickened to your desired consistency, approximately 2 to 3 minutes.
06 - Remove the saucepan from the heat and let the sauce cool slightly. It can then be used as a glaze for chicken skewers or served as a dipping sauce.