Top-Your-Own Cheesecake

Heat oven to 350 °F. In ungreased 13x9-inch pan, combine graham cracker crumbs, sugar and margarine; mix well. Press crust mixture evenly in bottom of pan. Bake at 350 °F. for 8 to 10 minutes or until toasted. Reduce oven temperature to 300 °F. Meanwhile, in large bowl, beat cream cheese and sugar until blended. Add vanilla and eggs; beat until smooth. Add sour cream; blend well. Pour into crust-lined pan. Bake at 300 °F. for 35 to 40 minutes or until edges are set and center is still soft. Remove from oven; place on wire rack. Cool 1 hour. Cover; refrigerate at least 6 hours or until serving time. Cut cheesecake into squares. Serve with assorted toppings.