1. In a blender, combine 1 cup fresh pineapple, tamari (or coconut aminos), fresh ginger, rice vinegar, honey, and arrowroot powder.
2. Blend until smooth.
3. Pour the mixture into a saucepan and heat over medium, stirring constantly until the sauce thickens enough to coat the back of a spoon (about 1 minute).
4. Remove from heat. Reserve ¼ cup of the sauce and pour it over the chicken to marinate for at least 30 minutes.
5. Prepare the coconut rice - Chose your preferred method.
Instant Pot Method: Rinse the rice under cold water using a fine mesh strainer until the water runs clear. Add the rinsed rice, coconut milk, water, and salt to the Instant Pot. Stir to combine. Seal the lid and set the valve to “Sealing.” Pressure cook on Low for 10 minutes. Let the pressure release naturally for 7 minutes, then quick-release any remaining pressure. Fluff the rice with a fork and set aside.
Stovetop Method: Rinse the rice thoroughly under cold water. 6. In a medium saucepan, combine the rinsed rice, coconut milk, water, and salt. Bring to a gentle boil over medium heat. Reduce the heat to low, cover, and simmer for 15–18 minutes, or until the liquid is absorbed and the rice is tender. Remove from heat and let sit, covered, for 5 minutes. Fluff with a fork.
6. Preheat your grill or grill pan.
7. Drizzle the sliced vegetables and pineapple spears with olive oil, and season with salt and pepper.
8. Grill the vegetables and pineapple on both sides until charred and tender.
9. Grill the marinated chicken for 3–4 minutes per side, or until fully cooked through.
10. Let the chicken rest for a few minutes, then slice it into strips or bite-sized pieces.
11. Divide the coconut rice evenly among serving bowls.
12. Top each bowl with grilled chicken, charred vegetables, and pineapple.
13. Drizzle with the remaining teriyaki sauce.
14. Garnish with sliced scallions and sesame seeds, and serve.