Combine 1 tablespoon water and cornstarch; stir well and set aside.

Combine remaining 3 tablespoons water, 3/4 cup blueberries, and next 3 ingredients in a saucepan; bring to boil. Add cornstarch mixture, and cook 1 minute, stirring constantly. Remove from heat; stir in remaining 1/4 cup blueberries. Spoon into a bowl; cover and chill.

To serve, peel and cube peaches to equal 1 cup. Spoon 2 tablespoons blueberry mixture into a 12-ounce parfait glass; top with 1/4 cup Raspberry Frozen Yogurt, 2 tablespoons peaches, 2 tablespoons Raspberry Frozen Yogurt, 2 tablespoons blueberry mixture and 2 tablespoons peaches. Repeat procedure with remaining ingredients.