Strawberry Shortcake Banana Bread

Preheat oven to 350 degrees F and butter and flour a 9-x-5" loaf pan. In a large bowl, whisk together 1 cup flour, baking soda, and salt. In another large bowl, combine 3/4 cup sugar, 1/2 cup butter, buttermilk, vanilla, egg and egg yolk until smooth. Pour wet ingredients over dry and stir until combined, then fold in strawberries and mashed bananas. Make crumb topping: Combine remaining 1/2 cup flour, remaining 1/4 cup sugar, remaining 1/2 cup butter, and a pinch of salt. Transfer batter to prepared baking dish and top with crumb topping. Bake until deeply golden and a toothpick comes out clean, about 60 minutes. Let cool at least 10 minutes before serving. To serve as a shortcake, stack banana bread with freshly whipped cream and strawberries.