Peel, wash and cut 1 small onion into chunks.
Wash and cut green bell peppers into chunks.
Wash and cut red bell peppers into chunks.
Next, cut the pork into small chunks or cubes.
Then, put the pork into a bowl, add 1 teaspoon of garlic powder, ½ teaspoon of salt and mix it well. Let it marinate for at least 15-20 minutes before cooking.
In a container, add ½ cup rice flour, ½ cup sweet potato starch and mix it well. (If you don’t have sweet potato starch. Try to use ½ cup of rice flour and ½ cup of all purpose flour. It works better than just all purpose flour.)
After that, put the marinated pork and cover up with flour mixture.
Beat 2 eggs in a container.
Dip the pork into the egg batter.
Then, dip the pork into the flour again.
And, put the batter pork on the plate.
Pour 2 cups of vegetable oil into the wok. Turn on medium small fire. Until the oil is hot enough around 350-375 F for deep fry. You can use a wooden chopstick to test the oil if it is hot enough when you don't have a thermometer. Put the wooden chopsticks into the oil, when you see some bubbles around it that means the oil is hot enough.
When the oil is ready for deep fry, add the breaded pork into the oil slowly. (First deep fry around 350F until slightly golden.)
Cook until the pork turns slightly golden brown and put the pork on a paper towel over the plate.
Turn the fire to medium high temperature around 375F. Double deep fry the pork which means deep fry the pork again.
And, cook until it’s golden brown.
In a pot, add 100% pineapple juice 1 cup. (You can use the pineapple juice from the can, make sure to choose 100% pineapple juice.)Then, add 2 tablespoons of soy sauce, 2 tablespoons of vinegar, ¾ cup of brown sugar, 3 tablespoons of ketchup, ¼ teaspoon of salt. Mix it very well. Turn on a small & low fire and cook it until the sugar is melted. After, in a small container, add 3 tablespoons of cornstarch, 2 tablespoons of water and mix it well. Next, pour the cornstarch mixture into the sauce to thicken it and set them aside. To find out details and step by step instructions, click this sweet and sour sauce recipe.
Pour 1 teaspoon of vegetable oil into the wok, turn on medium high fire. Add the cut onion and stir fry it.
After that, add the cut green and red bell peppers. Stir fry them a little bit.
Then, add the pineapple chunks and stir fry a little bit.
Next, add deep fried pork.
Lastly, pour the sweet and sour sauce over the deep fried pork. Stir them and make sure every deep fried pork is covered with the sauce. And, it’s ready to serve.