01 - Preheat oven to 350°F. 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 homogenous.
03 - In a separate bowl, whisk together all-purpose flour, granulated sugar, baking soda, and salt until evenly distributed.
04 - Gently combine dry ingredients into the wet mixture, mixing until moistened but not overworked.
05 - Carefully fold in diced strawberries and, if desired, chopped walnuts or pecans. Avoid overmixing to maintain a tender crumb.
06 - Transfer batter to prepared loaf pan, ensuring surface is leveled evenly.
07 - Bake for 50 to 55 minutes, or until a toothpick inserted into the center exits cleanly.
08 - Allow bread to cool in pan for 10 minutes, then remove and cool completely on a wire rack before slicing.