Baked Sweet and Sour Chicken

Ingredients

• boneless, skinless chicken breasts, cut into cubes (2)
• cornstarch (1/3 cup)
• garlic powder (1/2 teaspoon)
• salt (1/2 teaspoon)
• black pepper (1/4 teaspoon)
• olive oil (2 tablespoons)
• pineapple juice (1/2 cup)
• ketchup (1/2 cup)
• brown sugar (1/4 cup)
• apple cider vinegar (2 tablespoons)
• diced onion (1/4 cup)
• diced bell pepper (1/4 cup)
• diced pineapple (1/4 cup)