1 cup flour                      1/4 cup brown sugar
1/2 cup pecans               1 stick butter

Mix above ingredients and press into 9x13 pan.  Bake at 325 F.  for 15 min. or until brown:

Prepare and spread over cooled crust:
Cream 8 oz. cream cheese with 3/4 cup sugar
Add 1/2 of an 8 oz. pkg.  of whipped topping and 1 teaspoon vanilla  extract;

Spread with the following topping:
4 cups blueberries                1 cup sugar
2 Tablespoons cornstarch    1 Tablespoon lemon
                                                                juice   Mix all ingredients and cook over medium heat until  juice thickens.  Chill ;

Spread remaining whipped topping over dessert and chill.