Instructions: Place flour in a large bowl. Add butter or margarine, sour cream, 1/2 cup powdered sugar, egg yolk, vanilla and lemon peel. Work flour mixture with your hands into a medium-soft dough. Press dough into a ball. Cover and refrigerate 30 minutes.

Preheat oven to 400 degrees. Butter sides and bottom of a 10 inch springform baking pan. Slice dough into round pieces approximately 1/2 inch thick. Reserve one end
slice, then place remaining slices in a flat layer on pan bottom. Press slices together and smooth dough with your fingertips. Roll reserved dough slice into a rope about 1/4 inch thick. Place dough rope along inside, against bottom dough layer. Gently press into dough and edge of pan sides. Halve plums lengthwise and remove pits. Arrange plums; cut sides up, on dough and gently press into dough. Bake 20 to 25 minutes or until a wooden pick inserted in center of cake comes out clean. Remove from oven. Sift the remaining 3 tablespoons powdered sugar and vanilla sugar over plums. Let cool.

Note: Vanilla sugar is available at some specialty stores. You can make your own by burying a vanilla bean in granulated sugar or by adding powdered vanilla to granulated sugar. OR check page 829 in the Miscellaneous file.

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