01 - Preheat oven to 350°F. 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, mixing thoroughly.
03 - In a separate bowl, whisk together all-purpose flour, granulated sugar, baking soda, and salt.
04 - Add dry mixture to the wet ingredients, gently folding until just combined.
05 - Fold in diced strawberries and nuts if using, taking care not to overmix.
06 - Pour batter evenly into the prepared loaf pan.
07 - Place pan on the center rack and bake for 50 to 55 minutes, or until a toothpick inserted in 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.