Prepare the sauce by whisking together the soy sauce, pineapple juice, honey, minced ginger, and minced garlic in a small bowl; set aside.
Heat vegetable oil in a large skillet or wok over medium-high heat until shimmering.
Add the cubed chicken to the skillet, season with black pepper, and sear until golden brown and cooked through (internal temperature of 165°F), approximately 8 minutes.
Remove chicken from the skillet and set aside on a plate.
In the same skillet, add the diced bell pepper and red onion, sautéing for 3 to 4 minutes until the vegetables are tender-crisp.
Add the pineapple chunks to the skillet and cook for an additional 2 minutes to slightly caramelize the edges.
Return the cooked chicken to the skillet and pour the sauce mixture over the ingredients.
Stir in the cooked jasmine rice, tossing continuously for 2 to 3 minutes until the rice is heated through and evenly coated in the sauce.
Garnish with sliced green onions and serve immediately.