Salted Chocolate Banana Bread

Name: Salted Chocolate Banana Bread
Ingredients: 1/2 cup (115 grams) unsalted butter, at room temperature, plus additional for greasing; 1 1/2 cups (215 grams) all-purpose flour; 1 tablespoon flaked sea salt, plus more for garnish; 1 teaspoon baking soda; 1/2 teaspoon ground cinnamon; 1/8 teaspoon ground nutmeg; 1 cup (190 grams) granulated sugar; 1 1/4 cups (255 grams) smashed overripe bananas; 1/2 cup (100 grams) sour cream; 2 large eggs (100 grams); 1 teaspoon vanilla extract; 3 1/2 ounces (90 grams) semisweet chocolate, roughly chopped; Chili powder, for garnish