Start by cutting your chicken thighs (or breasts) into 1-2 inch pieces.
In a mixing bowl, combine the low-sodium soy sauce, lime juice, orange juice, lime zest, sesame oil, brown sugar, hoisin sauce, garlic, ginger, and red pepper flakes (if using). Whisk until well combined.
Place the chicken pieces at the bottom of your slow cooker. Next, pour the prepared sauce over the chicken. Then, add the pineapple chunks (with juice) and the cut bell peppers, spreading them evenly.
Cover the slow cooker and set it to cook on low for 6-8 hours or on high for 3-4 hours.
Once the cooking time is up, mix the cornstarch with the orange juice in a small bowl until it forms a slurry. Stir this mixture into the slow cooker and cook on high for an additional 30 minutes, or until the sauce thickens to your liking.
Once thickened, serve your Hawaiian chicken warm over rice or in tacos, and garnish with sliced green onions, sesame seeds, and slivered almonds.