In a large bowl or stand mixer with dough hook, combine water, maple syrup, yeast, and mashed bananas. Mix to combine.
Add bread flour, salt, and cinnamon to wet ingredients. Mix until dough is elastic and smooth. Add chocolate chips and knead until evenly dispersed.
Grease a large bowl with olive oil and place dough in it. Cover with plastic wrap drizzled with olive oil and a kitchen towel.
Allow to rise in a warm environment for 1-2 hours, or at room temperature for 2-3 hours, until doubled in size.
Grease a 9x13" baking pan with olive oil. Transfer dough to pan. Stretch one side up and fold toward the middle. Repeat with all sides to form a rectangle. Flip so seams are at bottom.
Cover with a baking tray or greased plastic wrap. Allow to rise for 30-45 minutes until puffy.
Preheat oven to 450°F.
Drizzle olive oil over dough surface and oil your hands. Dimple the dough all over, pressing almost to the bottom of the pan to create deep depressions.
Sprinkle top with turbinado sugar.
Bake at 450°F for 20-30 minutes until puffed and golden.
Remove from oven and top with extra chocolate chips. Rest for 10 minutes, then transfer to a wire rack.
Slice and serve warm with butter and flaky sea salt.
