Cut 1 lb of chicken into bite sized pieces and dry it well with paper towels. Add the chicken to a large bowl. Add 1/2 cup corn starch, salt, pepper, garlic powder and onion powder. Toss until well coated.
Next, add 3-4 tablespoons of peanut oil to a pan on medium-high heat.
Once the oil is hot add the chicken evenly to the bottom of the pan and allow it to cook for 3-4 minutes before stirring and cooking until crispy and golden on all sides.
Once the chicken is fully cooked remove it from the pan and set aside.
To make the sauce lower the heat in that same pan and add 1/2 cup pineapple juice, 1/4 cup ketchup, 1/4 cup apple cider vinegar, 1/3 cup brown sugar, 1 tbsp (less sodium) soy sauce, 1 tbsp minced garlic, and 1/2 tsp red pepper flakes.
Allow that to simmer for 2 minutes before stirring in a cornstarch slurry ( 1 tbsp cornstarch + 2 tbsp water). Once the sauce has thickened add your chicken back to the pan, toss to coat, and serve!
Top the whole pan of Sweet and Sour Chicken with chopped green onions. Enjoy! Serve over white rice.