1. First cut the pork into 1cm square pieces, then add a little pepper to the meat and marinate it for more than ten minutes. The time should not be too short, as it will not be easy to taste.

2. Select a pineapple, then peel the pineapple, cut the pineapple into small pieces and put it in a bowl for later use.

3. Prepare 30g of flour and add 50g of water to form a paste. Set it aside for about 10 minutes, then add the marinated meat pieces into the batter.

4. Prepare a pot and put an appropriate amount of cooking oil in the pot. When the oil temperature rises to 70% hot, add the meat pieces that have just been coated with batter, and fry them in the oil until the meat pieces turn golden brown. Then take out the meat pieces, drain the oil on them, and put them on a plate for later use.

5. Add chopped green onion and shredded ginger in the pot. After the aroma is released, add two spoons of tomato paste and stir quickly. Then add the sugar. After the sugar has completely melted, add a little vinegar and stir quickly.

6. Put the cut pineapple pieces into the pot and stir-fry quickly, then add the water starch prepared by adding corn starch and water. Pour in the water starch and cook until thick. Finally, add the freshly fried green and red peppers and meat cubes, stir-fry for 2 minutes, and then it is ready to serve.