First, clean and cut all of your vegetables and set to the side.
Next, heat up the 1 tablespoon vegetable oil, ¼ cup soy sauce, and 1 teaspoon chili paste in a wok or large pan on the stove set to medium. Then add all of the vegetables – and pineapple – and cook for 5 minutes.
Then add the ¼ cup sweet and sour sauce, ¼ cup sweet and sour duck sauce, and 1/8 cup water – to thin it out.
Continue to cook at medium heat for another 3-5 minutes – or until hot.