1 tbsp cornstarch mixed with 2 tbsp water (slurry)
Cooked rice for serving
Instructions
In a bowl, toss chicken slices with 2 tbsp cornstarch until coated. Set aside.
In a small bowl, whisk together rice vinegar, ketchup, brown sugar, and soy sauce to make the sauce.
Heat 1 tbsp oil in a wok or large skillet over high heat. Add chicken and stir-fry until golden and cooked through, about 4 minutes. Remove and set aside.
Add remaining 1 tbsp oil to the wok. Add bell peppers, onion, and pineapple. Stir-fry for 2-3 minutes until crisp-tender.
Add garlic and ginger; stir-fry for 30 seconds until fragrant.
Return chicken to the wok. Pour in the sauce and stir to combine. Bring to a simmer.
Stir the cornstarch slurry, then add to the wok. Cook, stirring, until sauce thickens and coats everything, about 1 minute.
Serve immediately over cooked rice.
Tips
For a vegetarian version, substitute chicken with firm tofu or extra vegetables.
Adjust sweetness and tanginess by varying brown sugar and vinegar to taste.
Leftovers can be stored in an airtight container in the refrigerator for up to 2 days.