Preheat your oven to 425°F (220°C) and line a large baking sheet with parchment paper for easy cleanup.
In a mixing bowl, combine the coconut aminos, olive oil, minced garlic, minced ginger, ground turmeric, red pepper flakes (if using), and a pinch of salt and pepper. Whisk together until well blended.
Add the chicken thighs to the marinade and let them sit for at least 10 minutes while you prepare the vegetables.
On the prepared baking sheet, arrange the sliced bell peppers, red onion, and pineapple chunks, creating a colorful base.
Place the marinated chicken thighs on top of the vegetables and pineapple. Drizzle any remaining marinade over the chicken and veggies.
Bake in the preheated oven for 25-30 minutes or until the chicken is cooked through and no longer pink in the center (internal temperature should be 165°F or 75°C).
Once cooked, remove from the oven and let it rest for 5 minutes.
Garnish with fresh cilantro before serving.
Notes
For extra heat, add red pepper flakes to the marinade.