How to marinate fish fillets with sauerkraut, smooth and tender?

The pickling method of fish slices with Chinese sauerkraut is as follows:

Ingredients: black fish fillet, ginger slices, onion, egg white, salt and starch.

Steps:

1, snakehead viscera, black belly, peeled and washed.

2. Cut into thin fish slices.

3. Soak onion and ginger slices in water for one hour to make onion Jiang Shui.

4. Pour the egg white and water starch into the fish fillets.

5, add a little salt, cooking wine, add onion Jiang Shui, mix well and marinate for a while.