Step 1: Prepare the Sauce - In a mixing bowl, whisk together the low-sodium soy sauce, rice vinegar, ketchup, brown sugar, minced garlic, and ground ginger.
Step 2: Combine Ingredients - In your crockpot, add the pineapple chunks (including the juice), chopped onion, and diced bell peppers. Pour the sauce over the top.
Step 3: Add the Chicken - Cut the boneless, skinless chicken breasts into bite-sized pieces and add them to the crockpot. Stir gently to combine.
Step 4: Cook - Cover the crockpot and set it to cook on low for 6-7 hours or on high for 3-4 hours.
Step 5: Thicken the Sauce - About 30 minutes before serving, mix the cornstarch with a little water to create a slurry. Stir this into the crockpot.
Step 6: Serve - Once cooking is complete, shred the chicken if desired, and serve the Crockpot Hawaiian Chicken over rice, in tacos, or on a fresh bed of greens.