Easy Sweet and Sour Chicken

3 tablespoons all-purpose flour

½ teaspoon garlic powder

½ teaspoon salt

½ teaspoon ground black pepper

1 pound skinless, boneless chicken breast halves, cut into 1-inch cubes

3 tablespoons vegetable oil, divided

3 celery ribs, sliced

2 green bell peppers, diced

1 onion, chopped

½ cup ketchup

½ cup lemon juice

½ cup crushed pineapple with syrup

⅓ cup packed brown sugar

Combine flour, garlic powder, salt, and black pepper in a shallow dish.

Roll and coat chicken cubes in flour mixture.

Heat 2 tablespoons vegetable oil in a skillet over medium-high heat.

Cook and stir chicken in hot oil until not longer pink in the center and juices run clear, 8 to 10 minutes; remove and set aside.

Heat 1 tablespoon vegetable oil in the same skillet over medium heat.

Cook and stir celery, green peppers, and onion in heated oil until slightly tender, about 5 minutes.

Return chicken to the skillet.

Whisk ketchup, lemon juice, pineapple, and brown sugar in a bowl; pour into the skillet; bring to a boil.

Cook and stir chicken and vegetables in sauce until heated through, 2 to 3 minutes.