These easy and elegant napoleon pastries feature layers of sliced bananas, store-bought dulce de leche, whipped cream, and toasted coconut.
Preheat oven to 400 degrees. Place puff pastry rectangles on a parchment-lined rimmed baking sheet. Bake until golden and puffed, 15 minutes. Remove and let cool on a wire rack. Meanwhile, in a medium bowl, using an electric mixer, beat cream and sugar on high until stiff peaks form, 2 to 3 minutes.
With a serrated knife, cut rectangles in half horizontally. Reserve 4 tops. Divide banana slices among 4 pastry bottoms, then drizzle with dulce de leche. Use 2 pastry bottoms and 2 pastry tops to make middle layers. Layer with whipped cream and coconut, then top with reserved pastry tops. Serve immediately.