Mock Mayonnais

• 2 cups cold water
• 2 tbsp cornstarch
• 1/4 cup olive oil
• 1/4 cup white vinegar
• 1/4 cup plain low-fat yogurt
• 2 tsp yellow mustard
• 1 tsp horseradish

Whisk together water and cornstarch in a small saucepan. Stir continously over a medium heat until the mixture comes to a boil.
Continue stirring and boiling for 1-2 minutes or until the mixture is clear.
Pour mixture into a bowl and whisk the remaining ingredients, in order listed. Whisk.
Refrigerate in a tightly sealed container. Should keep about 2 weeks.
To spice up your tuna fish, mix in a smidgy of ketchup or red pepper sauce. For a sweeter "Miracle Whip"-like mixture, add in a tsp or two of sugar.