01 - Preheat oven to 350°F (175°C). Grease a 9x5-inch loaf pan or line with parchment paper.
02 - In a large mixing bowl, mash bananas until smooth. Add melted butter, eggs, and vanilla extract, stirring until fully combined.
03 - In a separate bowl, whisk together flour, sugar, baking soda, and salt until well blended.
04 - Gradually add dry ingredients to wet mixture, stirring gently until just combined to avoid overmixing.
05 - Carefully fold in diced strawberries and, if desired, chopped walnuts or pecans.
06 - Transfer batter into the prepared loaf pan, leveling the surface.
07 - Bake for 50–55 minutes, or until a toothpick inserted into the center emerges clean.
08 - Let bread cool in the pan for 10 minutes, then remove to a wire rack to cool completely before slicing.