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 incorporated.
03 - In a separate bowl, whisk together all-purpose flour, granulated sugar, baking soda, and salt.
04 - Add dry ingredient mixture to the banana mixture, gently stirring until just combined. Avoid overmixing.
05 - Fold in diced strawberries and optional nuts carefully, making sure not to overwork the batter.
06 - Pour batter evenly into the prepared loaf pan.
07 - Bake in the center of the oven for 50 to 55 minutes, or until a toothpick inserted into 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.