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1
Preheat the oven to 350F.
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2
Arrange 1 phyllo sheet on a large baking tray that has been lined with parchment papers, and brush generously with some melted butter.
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3
Sprinkle with a quarter of the ground almonds.
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4
Top with the other 3 layers of phyllo, butter and almonds.
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5
Cut into 12 rectangles and bake until golden brown and crisp, about 10 minutes.
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6
Cool on a rack.
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7
In a small bowl, mix together the sour cream, mascarpone and 2 teaspoons caster sugar.
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8
Place 1 phyllo triangle on a serving plate and place some sour cream mixture on the top, followed by some thing slices of peach.
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9
Add another layer of phyllo and again top with the sour cream mixture and fresh peach slices, finally finishing with a phyllo layer.
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10
Make 3 more Napoleons in the same way.
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11
Dust with icing sugar and serve immediately.
