Hidden Veggie Banana Bread

Name: Hidden Veggie Banana Bread
Prep time: 10 min
Cook time: 55 min
Total time: 1 h 5 min
Cuisine: American
Ingredients: 2 ripe bananas; 1/3 cup butter (melted); 1 teaspoon baking soda; pinch salt; 1/2 cup sugar; 1 egg; 1 teaspoon vanilla extract; 1 medium yellow summer squash (about 5 -6 inches long); 1 cup all purpose flour; 1/2 cup whole wheat flour; 1/4 cup mini chocolate chips