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Instructions
Place peach slices into a large bowl and gently toss with lemon juice. Transfer 1 cup peaches to a blender and purée until smooth; set remaining peach slices aside.
Stir peach purée, yogurt, and lemon zest together in a medium bowl until well blended.
Layer 1/2 of the cake cubes in the bottom of a glass dish. Top with 1/2 of the peach slices, 1/2 of the yogurt mixture, then all of the remaining cake cubes. Arrange remaining peaches on top, reserving 5 or 6 slices for garnish. Cover with remaining yogurt mixture. Arrange reserved peach slices on top. Refrigerate until ready to serve.