In a medium saucepan add white vinegar, water, sugar, salt, MSG, and Tobasco. Cook over medium heat. Heat through. Mix 1 tablespoon of cornstarch with 2 tablespoons of water, and add to the saucepan. Add Worcestershire sauce and a dash of white pepper.
Cook until it is bubbly and thick. Remove from stove and add 2 Tbsp. ketchup. This will stay good in the refrigerator for about a week