Dark and Stormy Banana Bread

Name: Dark and Stormy Banana Bread
Ingredients: Cooking spray; 2 cups ( 260 g ) all-purpose flour; 1 teaspoon baking soda; 1 teaspoon ground cinnamon; 3/4 teaspoon ground ginger; 1/2 teaspoon ground nutmeg; 1/2 teaspoon fine sea salt; 1 cup ( 170 g ) lightly packed light brown sugar; 1/2 cup (1 stick) unsalted butter , melted; 2 large eggs; 2 tablespoons dark spiced rum; 2 teaspoons vanilla extract; 1 teaspoon finely grated fresh ginger; 2 medium very ripe bananas , mashed; 1/3 cup finely diced candied ginger , optional; 1 cup ( 114 g ) powdered sugar; 1 to 2 tablespoons fresh lime juice; 1 teaspoon finely grated lime zest; 1 to 2 tablespoons chopped candied ginger , optional