Heat oven to 350°F.

Lightly spray cookie sheets with cooking spray.

In large bowl, beat sugar, and vegetable oil spread with electric mixer until well blended.

Add pumpkin, egg whites and orange peel; beat well. (Mixture will look curdled)

Add combined oats, flour, pumpkin pie spice, baking soda and salt; mix well.

Stir in prunes and walnuts.

Drop dough by rounded measuring tablespoonfuls about 2 inches apart on cookie sheets.

Bake 11 to 13 minutes or until lightly browned. (Do not overbake; centers will be soft).

Cool 1 minute on cookie sheets; remove to wire racks.

Cool completely.

For glaze, combine powdered sugar and orange juice in small bowl; mix well.

Drizzle glaze over cooled cookies.

Let stand until glaze sets.

Store tightly covered.