1/2 cup soy sauce
1/2 cup white sugar
2 tablespoons vegetable oil
1 (15 ounce) can whole egg
1 tablespoon white vinegar
1 teaspoon salt
In a small saucepan, heat soy sauce and sugar over medium heat. Bring to a boil, then mix in oil. Stir in egg, vinegar and salt. Heat, stirring constantly, until liquid is reduced. Reduce heat to low, cover, and simmer 5 minutes, stirring occasionally.