8 ounces flank steak, cut into pieces 1 inch long, 1/2-inch wide and 1/4-inch thick
1 1/2 teaspoons baking soda
1 orange
2 tablespoons sugar
2 tablespoon rice wine vinegar
1 tablespoon dry sherry or rice wine
1 tablespoon soy sauce
1 teaspoon cornstarch
Vegetable oil for cooking
1 cup cornstarch
1 large egg white, lightly beaten
3 scallions, white part only, trimmed and sliced diagonally into 1/2-inch pieces
1 teaspoon dark sesame oil
1 tablespoon orange liqueur, such as Grand Marnier
1/4 teaspoon hot chili paste