1, first peel the potatoes and wash them, then cut them into strips with a thickness of 0.8cm and a length of 5cm, then put them in clean water and soak them for 3 minutes. After the potatoes are cut, they need to be soaked, so that the starch on the potato surface can be removed, thus preventing the potatoes from sticking to the pot.

2. Put a proper amount of water into the pot, boil the water, then put the potato chips into the pot, boil the potatoes for 1 min, then take them out and let them cool. When the potatoes are blanched, just boil them for 1 minute. If they are boiled for too long, the fried French fries will not be crisp.

3. Sprinkle the starch into the cooled potato chips, then put the potato chips into the refrigerator and freeze the potatoes for about 6 hours until the potatoes are completely frozen and hard. You can freeze more potatoes at one time. As long as you want to eat them, you can take some fried potatoes directly from the refrigerator. Boiled potatoes can be frozen in the refrigerator for 6 months.

4. Put an appropriate amount of oil into the pot. When the oil temperature is 70% hot, put the frozen potatoes into the pot, fry them on medium heat for 90 seconds, then take them out, then heat the oil temperature in the pot to 80% hot, then put the potato chips into the pot and fry them for 1 minute until the potatoes are golden brown. Then take out the pot and dip them in tomato sauce.