Source: Benihana/TVFN

2 cups soy sauce
1/3 cup sesame seeds (ground), roasted
1 cup whipping cream
1 pinch garlic powder
1 teaspoon dry mustard dissolved in 1 teaspoon water

Combine ingredients in blender or food processor and mix together for 15 seconds. Pour mixture and 1 cup whipping cream into saucepan, stirring over low heat. Sauce may be stored for up to 3 days.

When reheating, add 6 tablespoons whipping cream and stir completely before serving.