Preheat your oven to 350 degrees Fahrenheit. Butter a loaf pan. Mash the bananas in a large bowl then whisk in the eggs, brown sugar, melted butter, and tahini.
Bake the banana bread for 55-65 minutes, or until a toothpick inserted into the center comes out clean. Check it after 45 minutes and if the top is browning too quickly, tent it with foil.