Black Sesame Banana Muffins

Name: Black Sesame Banana Muffins
Ingredients: For the muffin batter:; 1/2 cup 1/2 C black sesame seeds; 1/2 cup mashed / pureed ripe bananas (about 4 large); 1 1/2 cups unbleached all purpose flour; 1 1/4 teaspoons baking soda; 3/4 teaspoon kosher salt; 3/4 cup tightly packed dark brown sugar; 1/3 cup organic Greek yogurt; 1/4 cup unsalted organic butter (1/2 stick), room temp; 2 large eggs, yolks and whites separated; For topping the muffins:; 2 tablespoons whole black sesame seeds; 2 tablespoons coarse sugar such as turbanado