How to Make It
Preheat oven to 375°F. Heat oil in a medium saucepan over medium-high.
Add ginger, garlic, and jalapeño; cook, stirring often, until fragrant, about 1 minute. Add onion and salt, and cook, stirring often, until onion begins to soften, about 2 minutes. Add brown sugar, soy sauce, ketchup, and rice vinegar; bring to a simmer, stirring constantly, until sugar is dissolved.
Sprinkle pineapple and bell pepper evenly in bottom of a lightly greased 3 quart baking dish. Pour brown sugar-soy mixture over pineapple mixture; top evenly with chicken tenders.
Bake in preheated oven until bubbly, and chicken is slightly crisp on top, about 20 minutes.
Toss mixture lightly to coat chicken, and sprinkle with scallions. Serve over rice.