Use cold water. The specific method is as follows: firstly, prepare the materials: 200g tenderloin, proper amount of sugar, a little raw flour, a little tomato sauce, a little white sesame, a little starch, a proper amount of cooking wine and an egg white.

1, wash tenderloin and cut into strips, then add a little salt, cooking wine and egg white, mix well and marinate for a while.

2. After the tenderloin is marinated for a while, sprinkle a proper amount of raw flour so that each strip is evenly glued with raw flour.

3, pour the oil from the pot and heat it. When the oil temperature is 80% hot, pour the tenderloin and fry it until golden brown.

4. Leave the oil in the pot and burn it to 100% heat again, then put the fried tenderloin in and fry it again, and then take it out to control the oil.

5. Pour out the hot oil in the pot, leave a little base oil, pour in tomato sauce and sugar, and stir-fry until the sugar melts.

6. Pour the starch into a small bowl, add a little water to make water starch, then pour it into the pot and stir well.

7. Pour in the fried tenderloin, stir fry evenly and sprinkle with cooked sesame seeds to serve.