01 - Preheat oven to 350°F (175°C). Grease a 9x5-inch loaf pan or line with parchment paper.
02 - In a large bowl, mash bananas until smooth. Add melted butter, eggs, and vanilla extract. Stir thoroughly to blend.
03 - In a separate bowl, whisk together all-purpose flour, granulated sugar, baking soda, and salt.
04 - Add dry ingredients to the banana mixture. Stir gently until ingredients are just combined.
05 - Carefully fold diced strawberries and optional chopped nuts into the batter, taking care not to overmix.
06 - Pour batter evenly into the prepared loaf pan.
07 - Bake in the center of the oven for 50 to 55 minutes, or until a toothpick inserted into the center emerges clean.
08 - Allow bread to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely before slicing.