Good-Cooking - Buttery Upside-Down Cake with Mango

Ingredients

• 12 tablespoons (1 1/2 sticks) unsalted butter, at room temperature
• 1 1/2 cups pitted, peeled, and (3/4 inch) cubed ripe mango (about 2 mangoes)
• 1 1/2 cups peeled, cored, and (3/4 inch) cubed ripe pineapple (about 1/2 small pineapple)
• 1 cup (packed) light brown sugar
• 2 tablespoons dark rum
• 2 cups cake flour
• 2 teaspoons baking powder
• 1 teaspoon ground ginger
• Pinch of salt
• 1 cup granulated sugar
• 2 large eggs, at room temperature
• 1 teaspoon vanilla extract
• 3/4 cup milk
• 2 tablespoons chopped candied ginger
• 1/2 cup (2 ounces) coarsely chopped pecans, toasted