Hi! I have never eaten at the Kobe in Dallas. However, this is a recipe that is always used more in our area. See if this helps any.

1 quart of mayonnaise
1 cup of water
5 tbsp. sugar
1/4 cup ketchup (I have seen more and less ketchup in different recipes)
1 teaspoon lemon juice (taste and add more if needed)
1 teaspoon of paprika
1 teaspoon of garlic powder

These are the basic ingredients and you can work with the tastes to perhaps get close to what you have in Dallas. Good luck!