Peach Melba French Toast Casserole

Name: Peach Melba French Toast Casserole
Ingredients: 1 large loaf brioche , challah, or crusty bread (about 21 ounces); 2 tablespoons butter , softened; 8 ounces fresh or frozen peaches , peeled and sliced 1/2 inch thick; 6 ounces fresh or frozen raspberries; 8 large eggs; 2 1/3 cups heavy whipping cream; 3/4 cup sugar; 3/4 teaspoon kosher salt; 1 tablespoon vanilla extract; 2 tablespoons sugar; 1/2 cup sliced almonds (optional); 10 ounces fresh or frozen raspberries; 1/4 cup sugar; 1 teaspoon vanilla extract; 1/8 teaspoon kosher salt