These sweet treats are the perfect finish to a Valentine's Day dinner celebration.
Heat oven to 400 degrees. Roll pastry to 1/8 inch thick; cut out four 5-inch squares. Place on a parchment-lined baking pan; bake about 15 minutes, until golden. Remove from oven; set aside to cool.
Place butter, sugar, vanilla, and salt in a saute pan over medium heat. Cook, stirring frequently, until butter and sugar are melted and combined, about 5 minutes. Stir in cream until mixture is smooth. Add bananas; gently stir until coated. Remove from heat.
Using a paring knife, remove and discard a 2-inch square from top center of reserved pillows; keep bottom intact. Fill with banana mixture. Dust with confectioners' sugar, and garnish with chocolate shavings. Serve.
Puff pastry comes in rolled sheets. When making these "pillows," cut dough along the folds to prevent uneven rising.