Preheat the oven to 375º. Pat the chicken dry and cube the chicken into small cubes in equal sizes. This will help them cook quicker and more evenly. Start to cook the rice according to the package, this typically takes about 20 minutes.
Add the cubed chicken to a large bowl and add the cornstarch, and pepper to the chicken. Mix the cornstarch and seasonings well into the chicken. In a medium sized bowl, add the garlic ginger sauce ingredients together and whisk well: soy sauce, honey, ginger, garlic, oil, rice vinegar, pineapple juice .
On a parchment lined cooking sheet with edges, add the chicken to the parchment paper. The parchment keeps the sauce from burning and it keeps everything moist, please see notes if you can't use parchment paper. Bake in the oven for about 8-10 minutes. Pull the chicken out, pour 3/4ths of the garlic ginger sauce over the chicken and pop it back into the oven for another 10 -12 minutes or until the chicken gets to 165º internally. The leftover sauce will be used for garnishing the rice bowls.
While the chicken is cooking, gather and prep the other ingredients for the chicken poke bowls. Set aside.
Assemble the bowls! Start with rice as the base, add ginger chicken, jalapeño. chopped pineapple, edamame, cucumbers, carrots, green onions, pickled onions, sesame seeds and any other fresh toppings you choose. You can also drizzle these bowls with Sriracha or kewpie mayo for the ultimate flavor.