This sounds very much like a favorite dish we make at Thanksgiving and or Christmas, except ours calls for jello.
BLUEBERRY CREAM CHEESE DESSERT
1 cup chopped pecans
1/2 cup margarine -- melted
1 cup flour
8 ounces cream cheese -- softened
1 cup powdered sugar
8 ounces Cool Whip
4 cups blueberries -- fresh or frozen, divided
1 cup sugar -- divided
3 tablespoons cornstarch
1/4 cup water
FIRST, combine crust ingredients; spread in a 9x13" pan and cook for 15 minutes at 350°F. Cool.
SECOND, combine 1/2 cup sugar and cornstarch in a saucepan. Add water, then 2 cups of the blueberries. Cook over medium heat, stirring constantly, until thickened and translucent (about 10 minutes).
Crush some of the blueberries as they cook. Remove from heat and add remaining sugar and blueberries. Cool.
THIRD, cream together the cream cheese and powdered sugar. Fold in Cool Whip. Spread over cooled crust. Chill.
FOURTH, Spread the blueberries over cream cheese filling and chill.