"Bananas go tres tropical in this twist on a classic French upside-down tart, traditionally made with apples...."
INGREDIENTS
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All-purpose flour, for work surface
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1 sheet frozen puff pastry (such as Dufour), thawed
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6 tablespoons unsalted butter
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3/4 cup packed light-brown sugar
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1/2 teaspoon ground cinnamon
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1/8 teaspoon salt
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5 large ripe bananas, peeled, halved lengthwise
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1 teaspoon pure vanilla extract
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2 tablespoons dark rum
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1 cup creme fraiche, for serving