Black tahini banana bread

Name: Black tahini banana bread
Prep time: 10 min
Cook time: 1 h 20 min
Total time: 1 h 20 min
Yield: 10 slices
Ingredients: 150 g unsalted butter; 350 g sweet bananas, ripe; 150 g dark brown sugar, soft; 2 large eggs; 170 g all-purpose flour; 30 g cornstarch; 2 tbsp cocoa powder, black; 2 pinches salt; 1 tsp baking soda; 100 g black tahini; 2 tsp natural vanilla extract; black sesame seeds; 20 g sugar; 250 g ricotta cheese, smooth; 50 g Greek yogurt; 1 tsp natural vanilla extract