Combine the cornstarch and water in a saucepan.
Bring to boiling over high heat.
Reduce heat and cook 5 minutes, or until mixture is thick and clear.
Remove from heat and set aside to cool.
Add to cooled mixture the lemon juice, ketchup, oil, Worcestershire sauce, sweetener, and a blend of remaining ingredients.
Beat with a rotary beater until smooth and well blended.
Store, covered, in refrigerator.
Shake well before using.