Oreo Cheesecake

Crust;

1 (20 oz.) package OREO chocolate sandwich cookies

1/3 cup margarine, melted

3 (8 oz.) packages cream cheese, softened

3/4 cup sugar

4 eggs, at room temp.

1 cup dairy sour cream

1 tsp. vanilla extract

Finely roll 30 cookies; coarsely chop 20 cookies. In a bowl, combine finely rolled cookie crumbs and margarine. Press on the bottom and 2 inches up the sides of 9-inch spring form pan; set aside. With a mixer, beat cream cheese and sugar until creamy; blend in eggs, sour cream and vanilla extract; fold in chopped cookies. Spread mixture into the prepared crust. Bake at 350 degrees for 60 minutes or until set. Cool on wire rack; chill at least 4 hours. Halve remaining cookies; remove side of pan. Garnish with whipped cream and cookie halves.