Crust: Combine all ingredients and pat into bottom and sides of a 9-inch springform pan. Bake at 350 degrees for 10 minutes and cool.

Cheesecake: Sieve cottage cheese (or puree in blender until smooth). Pour into large mixing bowl. Add cream cheese. Beat with high speed of electric mixer until blended and creamy. Add sugar. On low speed, add cornstarch, Grand Marnier, eggs and almond extract. Beat until blended. Add melted butter and sour cream and blend at low speed.

Filling: Measure out 3/4 cup cheesecake batter. Add raspberry preserves and flavoring. Mix well, then add cornstarch and mix again.

Assembly: Pour some cheesecake into crust, spoon on half the raspberry mixture. Add remaining cheesecake mixture, then the remaining raspberry mixture. Cut through the batter with a knife or rubber spatula to create a marbling effect.

Bake at 325 degrees for 1 hour and 10 minutes, or until firm around edges. Turn off oven; leave cake in oven for 2 hours. Remove and cool completely on wire rack. Chill, remove sides of pan.

Decorate with chocolate leaves if desired. Serves 12.