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 the bananas until smooth. Add melted butter, eggs, and vanilla extract. Stir until thoroughly combined.
03 - In a separate bowl, whisk together flour, granulated sugar, baking soda, and salt.
04 - Add the dry mixture to the wet ingredients. Stir gently until just incorporated, ensuring not to overmix.
05 - Gently fold in diced strawberries and chopped nuts if using, distributing them evenly through the batter.
06 - Pour batter into the prepared loaf pan, spreading evenly.
07 - Bake for 50 to 55 minutes, or until a toothpick inserted in the center comes out clean.
08 - Allow bread to cool in the pan for 10 minutes. Transfer to a wire rack to cool completely before slicing.