Crispy battered chicken pieces are tossed in a vibrant tangy-sweet sauce made with vinegar, ketchup, and sugar. This beloved family favorite pairs perfectly with steamed rice and brings comforting flavors the whole table will enjoy.
Cut chicken breast into bite-sized pieces. Season chicken with salt and black pepper for 5 minutes.
Beat eggs in a bowl. In a separate bowl, mix cornstarch and flour thoroughly. Dredge chicken in egg, then coat evenly with the cornstarch-flour mixture.
Heat vegetable oil in a large skillet over medium-high heat until shimmering. Fry chicken pieces in batches, turning occasionally, until golden and crispy (6–8 minutes). Transfer cooked chicken to a paper towel-lined plate.
Prep the bell pepper by removing seeds and chopping into 1-inch pieces. Drain pineapple chunks. In a clean skillet, stir-fry bell pepper and pineapple over medium heat for 2–3 minutes until bell pepper softens slightly.
In a bowl, mix ketchup, white vinegar, sugar, and soy sauce until smooth. Pour sauce into the skillet with vegetables and bring to a simmer. Stir for 2–3 minutes until slightly thickened.
Return fried chicken to the skillet and toss quickly, ensuring each piece is coated with the sauce. Heat for 1–2 additional minutes on low to meld flavors. Serve hot, optionally with steamed rice.