Instructions: Crust: Place crumbs in mixing bowl and add sugar and cinnamon, then stir in margarine.

Grease an 8" springform pan on bottom and sides. Sprinkle thin layer of crumbs on bottom of pan and press down with metal 1/4 cup measure. Pat crumbs on sides and press into position with side of measuring cup. Work around sides with fingers to make crumbs of even height. Any remaining crumbs may be added to bottom crust. Bake crust at 350 F for 5 minutes.

Filling: Beat eggs until light, then add sugar and beat for 5 minutes.

Add cream cheese and vanilla and Grand Marnier; mix well. Turn into crumb crust; bake at 375 F for 20 minutes. Cool for 15 minutes.

Topping: Blend sour cream, sugar, vanilla, and Grand Marnier well, then pour over filling.

Bake at 475 F for 5 minutes. Cool cake, then chill overnight before serving.

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