Preheat oven to 350 F and grease a 9x5 loaf pan with baking spray.
Whisk together salt, flour, cinnamon, and baking soda. Set aside.
In a large mixing bowl, cream butter and sugar with an electric mixer. Then add egg whites, greek yogurt, and vanilla. Beat until thick.
Mix in 1/3 of the flour mixture at a time, mixing at low speed until combined. Then gently fold in the bananas, strawberries, and chocolate chips.
Pour the batter into the loaf pan and bake on the center rack for 1 hour and 15 minutes. At the 1 hour mark, check your bread with a toothpick to see if it comes out clean. Let the pan cool for at least 15 minutes before slicing.
Tip: place the bananas in a strainer over a bowl and gently mash/stir them to release excess liquid.