Preheat the oven to 350F/177C convection (325F/163C conventional + a few more minutes of bake time). Grease and line a 9”x5” loaf pan with baking spray and parchment paper.
In a medium bowl, mash the bananas until it looks like puree and there are no more large chunks.
3 (400g or 1 3/4 cup) large ripe bananas
Grate lemon zest and squeeze the juice out of one lemon onto the mashed bananas and set it aside.
1/2 lemon, zest and juice
In a large bowl whisk together the sugar and oil until they're combined.
1 cup (200g) granulated sugar, 1/2 cup (118mL) vegetable oil
Add the eggs, one at a time, whisking until each one is fully incorporated.
3 large eggs
Then add the greek yogurt, whisking for 2 minutes, until they are completely smooth.
1/4 cup (56g) greek yogurt (or sour cream)
Add in the mashed bananas and whisk until it’s combined.
Fold in the flour, baking powder, cinnamon and salt just until the last streak of flour is combined.
2 1/4 cups (270g) all-purpose flour, 1 Tbsp baking powder, 1 tsp cinnamon, 1/2 tsp fine sea salt
Whisk together the cinnamon and sugar. Pour the batter into the prepared loaf pan and sprinkle the cinnamon sugar on top.
1 Tbsp (12g) granulated sugar, 1/4 tsp ground cinnamon
Bake for 55-60ish minutes, (insert a knife in the center and make sure no raw batter comes out on it). Remove from the oven and let it cool in the pan for 30-60 minutes.