Dice the chicken breast, bell peppers, and red onion into uniform bite-sized pieces.
In a small glass bowl, whisk together the honey, tamari, rice vinegar, minced ginger, and minced garlic to create the glaze.
Heat the olive oil in a large skillet or wok over medium-high heat until shimmering.
Season the chicken with sea salt and black pepper, then add it to the skillet, searing until golden brown and cooked through.
Remove the chicken from the pan and set aside; add the bell peppers and onions to the same pan, sautéing for 3-4 minutes until crisp-tender.
Add the fresh pineapple chunks and the cooked chicken back into the skillet.
Pour the prepared sauce over the mixture and toss continuously for 1-2 minutes until the sauce thickens and beautifully glazes the ingredients.
Remove from heat, drizzle with the toasted sesame oil, and serve immediately over the warm cooked brown rice.