Stir fried beef with pineapple

Ingredients:

8 oz. fillet of beef
2 oz. pineapple pieces
2 oz. crushed ginger
2 fl.oz vegetable oil
1 spring onion
2 teaspoons dry sherry
Seasoning one:

1 beaten egg white
1/2 teaspoon salt
2 teaspoons of vegetable oil
2 teaspoons of cornflour

Seasoning two:

2 tablespoons chicken stock
1/2 teaspoon salt
1/2 teaspoon sugar
1 tablespoon light soy sauce
1/2 teaspoon cornflour

Preparation:

Partially freeze beef, cut across grain into thin slices. Cut into strips of 1 x 2 inches.
Mix ingredients from seasoning one into a bowl. Coat meat with seasoning and leave to marinate for 60 minutes.
Cut the pineapple into pieces, slice onion. Put all ingredients from Seasoning two in a bowl and mix well.
Heat oil in a wok, stir fry onion and ginger for 1 minute. Set aside. Keep warm.
Add beef to wok, fry until brown, add wine and seasoning two.
Mix, simmer for 2 minutes, add pineapple and onion and ginger, mix and fry for 2 minutes, until heated through.