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. Stir in melted butter, eggs, and vanilla extract until uniformly combined.
03 - In a separate bowl, whisk together all-purpose flour, granulated sugar, baking soda, and salt.
04 - Gently incorporate the dry ingredients into the banana mixture, mixing until just blended.
05 - Fold in diced strawberries and, if desired, chopped walnuts or pecans, being careful not to overmix.
06 - Pour the batter into the prepared loaf pan.
07 - Bake in the preheated oven for 50–55 minutes, or until a toothpick inserted into the center emerges clean.
08 - Allow bread to cool in the pan for 10 minutes before transferring to a wire rack. Let cool completely before slicing.