Rinse jasmine rice under cold water until clear; combine with chicken stock in a medium saucepan.
Bring rice to a boil, then reduce heat to low, cover, and simmer for 15 minutes or until liquid is absorbed; keep covered off heat.
In a small mixing bowl, whisk together soy sauce, rice vinegar, honey, grated ginger, minced garlic, and cornstarch until the slurry is homogenous.
Heat 1 tablespoon of vegetable oil in a large wok or skillet over medium-high heat until shimmering.
Add chicken pieces in a single layer and sear until golden brown and cooked through (approximately 6-8 minutes); remove chicken from pan and set aside.
Add the remaining 1 tablespoon of oil to the same pan; sauté the diced bell peppers and pineapple chunks for 3-4 minutes until the pepper softens and the pineapple caramelizes slightly.
Return the cooked chicken to the pan and pour the prepared sauce over the mixture.
Toss continuously for 2 minutes until the sauce thickens into a glossy glaze coating all components.
Fluff the cooked rice with a fork and portion into bowls.
Top the rice with the pineapple chicken mixture and garnish with sliced green onions and sesame seeds.