Sweet and Sour Pork Stir Fry

Name: Sweet and Sour Pork Stir Fry
Prep time: 15 min
Cook time: 15 min
Total time: 30 min
Cuisine: Asian, Chinese
Ingredients: 1 pound pork loin, cut into bite-sized pieces; 1 tablespoon Chinese five-spice powder; 0.25 cup vegetable oil, divided, or as needed; 0.5 red bell pepper, cut into bite-sized pieces; 0.5 yellow bell pepper, cut into bite-sized pieces; 0.5 orange bell pepper, cut into bite-sized pieces; 0.5 red onion, cut into bite-sized pieces; 3 cloves garlic, chopped; 1 cup chopped broccoli; 1 cup fresh pineapple, cut into bite-size chunks; 0.25 cup sweet and sour sauce